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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 楊哲人 | zh_TW |
dc.contributor.advisor | Jer-Ren Yang | en |
dc.contributor.author | 鄒翔琳 | zh_TW |
dc.contributor.author | Hsiang-Lin Tsou | en |
dc.date.accessioned | 2023-08-16T16:32:43Z | - |
dc.date.available | 2023-11-09 | - |
dc.date.copyright | 2023-08-16 | - |
dc.date.issued | 2023 | - |
dc.date.submitted | 2023-08-07 | - |
dc.identifier.citation | [1] J.R. Davis, Aluminum and aluminum alloys, ASM international1993.
[2] J.M. Runge, J.M. Runge, A Brief History of Aluminum and Its Alloys, The Metallurgy of Anodizing Aluminum: Connecting Science to Practice (2018) 1-63. [3] G.E. Totten, D.S. MacKenzie, Handbook of aluminum: vol. 1: physical metallurgy and processes, CRC press2003. [4] J.-F. Nie, Physical metallurgy of light alloys, Physical metallurgy, Elsevier2014, pp. 2009-2156. [5] A. Warren, Developments and challenges for aluminum--A boeing perspective, Mater. Forum, 2004, pp. 24-31. [6] J.R. Davis, Alloying: understanding the basics, ASM international2001. [7] A.I. Staff, A.I.H. Committee, ASM Handbook: Heat Treating. Vol. 4, A S M International1990. [8] I. Polmear, Aluminium Alloys--A Century of Age Hardening, Mater. Forum, 2004, p. 13. [9] G. Preston, The diffraction of X-rays by age-hardening aluminium copper alloys, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences 167(931) (1938) 526-538. [10] S.-S. Wang, I.W. Huang, L. Yang, J.-T. Jiang, J.-F. Chen, S.-L. Dai, D.N. Seidman, G.S. Frankel, L. Zhen, Effect of Cu Content and Aging Conditions on Pitting Corrosion Damage of 7xxx Series Aluminum Alloys, J. Electrochem. Soc. 162(4) (2015) C150-C160. [11] M. Puiggali, A. Zielinski, J. Olive, E. Renauld, D. Desjardins, M. Cid, Effect of microstructure on stress corrosion cracking of an Al-Zn-Mg-Cu alloy, Corros. Sci. 40(4-5) (1998) 805-819. [12] A.U. Rao, V. Vasu, M. Govindaraju, K.S. Srinadh, Stress corrosion cracking behaviour of 7xxx aluminum alloys: A literature review, Transactions of Nonferrous Metals Society of China 26(6) (2016) 1447-1471. [13] B. Cina, Reducing the susceptibility of alloys, particularly aluminium alloys, to stress corrosion cracking, Google Patents, 1974. [14] J.K. Park, Influence of retrogression and reaging treatments on the strength and stress corrosion resistance of aluminium alloy 7075-T6, Materials Science and Engineering: A 103(2) (1988) 223-231. [15] K. Rajan, W. Wallace, J. Beddoes, Microstructural study of a high-strength stress-corrosion resistant 7075 aluminium alloy, J. Mater. Sci. 17 (1982) 2817-2824. [16] T. Marlaud, A. Deschamps, F. Bley, W. Lefebvre, B. Baroux, Evolution of precipitate microstructures during the retrogression and re-ageing heat treatment of an Al–Zn–Mg–Cu alloy, Acta Mater. 58(14) (2010) 4814-4826. [17] J. Li, N. Birbilis, C. Li, Z. Jia, B. Cai, Z. Zheng, Influence of retrogression temperature and time on the mechanical properties and exfoliation corrosion behavior of aluminium alloy AA7150, Mater. Charact. 60(11) (2009) 1334-1341. [18] D. Nguyen, K. Rajan, W. Wallace, Discussion of “Effect of retrogression and reaging treatments on the microstructure of Al-7075-T651”, Metall. Trans. A 16 (1985) 2068-2068. [19] J.K. Park, A. Ardell, Effect of retrogression and reaging treatments on the microstructure of Ai-7075-T651, Metallurgical and Materials Transactions A 15 (1984) 1531-1543. [20] C. Meng, H. Long, Y. Zheng, A study of the mechanism of hardness change of Al-Zn-Mg alloy during retrogression reaging treatments by small angle X-ray scattering (SAXS), Metallurgical and Materials Transactions A 28 (1997) 2067-2071. [21] F. Viana, A. Pinto, H. Santos, A. Lopes, Retrogression and re-ageing of 7075 aluminium alloy: microstructural characterization, J. Mater. Process. Technol. 92 (1999) 54-59. [22] M. Kanno, I. Araki, Q. Cui, Precipitation behaviour of 7000 alloys during retrogression and reaging treatment, Mater. Sci. Technol. 10(7) (1994) 599-603. [23] K. Raman, E.S. Das, K. Vasu, VALUES OF SOLUTE-VACANCY BINDING ENERGY IN ALUMINIUM MATRIX FOR Ag, Be, Ce, Dy, Fe, Li, Mn, Nb, Pt, Sb, Si, Y, AND Yb, Indian Inst. of Science, Bangalore, 1970. [24] M. Doyama, Vacancy-solute interactions in metals, J. Nucl. Mater. 69 (1978) 350-361. [25] C. Wolverton, Solute–vacancy binding in aluminum, Acta Mater. 55(17) (2007) 5867-5872. [26] I. Polmear, D. StJohn, J.-F. Nie, M. Qian, Light alloys: metallurgy of the light metals, Butterworth-Heinemann2017. [27] Y. Du, Y. Chang, B. Huang, W. Gong, Z. Jin, H. Xu, Z. Yuan, Y. Liu, Y. He, F.-Y. Xie, Diffusion coefficients of some solutes in fcc and liquid Al: critical evaluation and correlation, Materials Science and Engineering: A 363(1-2) (2003) 140-151. [28] G. Neumann, C. Tuijn, Self-diffusion and impurity diffusion in pure metals: handbook of experimental data, Elsevier2011. [29] D. Simonovic, M.H. Sluiter, Impurity diffusion activation energies in Al from first principles, Physical Review B 79(5) (2009) 054304. [30] M. Tiryakioğlu, J. Staley, Physical metallurgy and the effect of alloying additions in aluminum alloys, Handbook of aluminum 1 (2003) 81-210. [31] G. Sha, A. Cerezo, Early-stage precipitation in Al–Zn–Mg–Cu alloy (7050), Acta Mater. 52(15) (2004) 4503-4516. [32] J. Gjønnes, C.J. Simensen, An electron microscope investigation of the microstructure in an aluminium-zinc-magnesium alloy, Acta Metall. 18(8) (1970) 881-890. [33] F. Crossley, L. Mondolfo, Mechanism of grain refinement in aluminum alloys, JOM 3 (1951) 1143-1148. [34] C. Xu, W. Xiao, R. Zheng, S. Hanada, H. Yamagata, C. Ma, The synergic effects of Sc and Zr on the microstructure and mechanical properties of Al–Si–Mg alloy, Materials & Design 88 (2015) 485-492. [35] J. Taylor, B. Parker, I. Polmear, Precipitation in AI-Cu-Mg-Ag casting alloy, Metal Science 12(10) (1978) 478-482. [36] I. Polmear, Light alloys: from traditional alloys to nanocrystals, Elsevier2005. [37] T. Sato, S. Hirosawa, K. Hirose, T. Maeguchi, Roles of microalloying elements on the cluster formation in the initial stage of phase decomposition of Al-based alloys, Metallurgical and Materials Transactions A 34 (2003) 2745-2755. [38] Y. Zou, X. Wu, S. Tang, Q. Zhu, H. Song, L. Cao, Co-precipitation of T′ and η′ phase in Al-Zn-Mg-Cu alloys, Mater. Charact. 169 (2020) 110610. [39] R.J. Hussey, J. Wilson, Light Alloys: Directory and Databook, Springer Science & Business Media2013. [40] S. Ringer, K. Hono, Microstructural evolution and age hardening in aluminium alloys: atom probe field-ion microscopy and transmission electron microscopy studies, Mater. Charact. 44(1-2) (2000) 101-131. [41] W. Shu, L. Hou, C. Zhang, F. Zhang, J. Liu, J. Liu, L. Zhuang, J. Zhang, Tailored Mg and Cu contents affecting the microstructures and mechanical properties of high-strength Al–Zn–Mg–Cu alloys, Materials Science and Engineering: A 657 (2016) 269-283. [42] M. Conserva, E. Di Russo, O. Caloni, Comparison of the influence of chromium and zirconium on the quench sensitivity of Al-Zn-Mg-Cu alloys, Metallurgical Transactions 2 (1971) 1227-1232. [43] A. Deschamps, Y. Bréchet, Influence of quench and heating rates on the ageing response of an Al–Zn–Mg–(Zr) alloy, Materials Science and Engineering: A 251(1-2) (1998) 200-207. [44] F. Wang, D. Qiu, Z.-L. Liu, J.A. Taylor, M.A. Easton, M.-X. Zhang, The grain refinement mechanism of cast aluminium by zirconium, Acta Mater. 61(15) (2013) 5636-5645. [45] R. Rana, R. Purohit, S. Das, Reviews on the influences of alloying elements on the microstructure and mechanical properties of aluminum alloys and aluminum alloy composites, International Journal of Scientific and research publications 2(6) (2012) 1-7. [46] S.P. Ringer, T. Sakurai, I. Polmear, Origins of hardening in aged Al Gu Mg(Ag) alloys, Acta Mater. 45(9) (1997) 3731-3744. [47] T.-F. Chung, Y.-L. Yang, B.-M. Huang, Z. Shi, J. Lin, T. Ohmura, J.-R. Yang, Transmission electron microscopy investigation of separated nucleation and in-situ nucleation in AA7050 aluminium alloy, Acta Mater. 149 (2018) 377-387. [48] A. Guinier, Structure of age-hardened aluminium-copper alloys, Nature 142(3595) (1938) 569-570. [49] V. Gerold, Röntgenographische Untersuchungen über die Aushärtung einer Aluminium-Kupfer-Legierung mit Kleinwinkel-Schwenkaufnahmen*, Int. J. Mater. Res. 54(10) (2022) 593-599. [50] K. Toman, The structure of Guinier–Preston zones. I. The Fourier transform of the diffuse intensity diffracted by a Guinier–Preston zone, Acta Crystallographica 8(9) (1955) 587-591. [51] V. Gervold, The structure of Guinier–Preston zones in aluminum–copper alloys, Acta Crystallographica 11(3) (1958) 230-230. [52] R. Nicholson, J. Nutting, Direct observation of the strain field produced by coherent precipitated particles in an age-hardened alloy, The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics 3(29) (1958) 531-535. [53] Y.-C. Chang, Crystal structure and nucleation behavior of (111) precipitates in an aluminum-3.9 copper-0.5 magnesium-0.5 silver (wt. percent) alloy, Carnegie Mellon University, 1992. [54] R. Rioja, D. Laughlin, The early stages of GP zone formation in naturally aged Ai-4 wt pct cu alloys, Metall. Trans. A 8 (1977) 1257-1261. [55] J. Liu, R. Hu, J. Zheng, Y. Zhang, Z. Ding, W. Liu, Y. Zhu, G. Sha, Formation of solute nanostructures in an Al–Zn–Mg alloy during long-term natural aging, J. Alloys Compd. 821 (2020) 153572. [56] A. Lervik, E. Thronsen, J. Friis, C.D. Marioara, S. Wenner, A. Bendo, K. Matsuda, R. Holmestad, S.J. Andersen, Atomic structure of solute clusters in Al–Zn–Mg alloys, Acta Mater. 205 (2021) 116574. [57] L. Berg, J. Gjønnes, V. Hansen, X. Li, M. Knutson-Wedel, D. Schryvers, L. Wallenberg, GP-zones in Al–Zn–Mg alloys and their role in artificial aging, Acta Mater. 49(17) (2001) 3443-3451. [58] G. Jürgens, M. Kempe, H. Löffler, On the kinetics of the growth of Guinier-Preston zones (GPZ) in AlZn (2.5 at%) Mg (X) alloys, Physica Status Solidi Applied Research 21(1) (1974) K39-K41. [59] X. Xu, J. Zheng, Z. Li, R. Luo, B. Chen, Precipitation in an Al-Zn-Mg-Cu alloy during isothermal aging: Atomic-scale HAADF-STEM investigation, Materials Science and Engineering: A 691 (2017) 60-70. [60] A. Kverneland, V. Hansen, G. Thorkildsen, H. Larsen, P. Pattison, X. Li, J. Gjønnes, Transformations and structures in the Al–Zn–Mg alloy system: A diffraction study using synchrotron radiation and electron precession, Materials Science and Engineering: A 528(3) (2011) 880-887. [61] X. Li, V. Hansen, J. Gjønnes, L. Wallenberg, HREM study and structure modeling of the η′ phase, the hardening precipitates in commercial Al–Zn–Mg alloys, Acta Mater. 47(9) (1999) 2651-2659. [62] J. Auld, C. SM, THE STRUCTURE OF THE METASTABLE ETA'PHASE IN ALUMINIUM-ZINC-MAGNESIUM ALLOYS, (1974). [63] W. Yang, S. Ji, M. Wang, Z. Li, Precipitation behaviour of Al–Zn–Mg–Cu alloy and diffraction analysis from η′ precipitates in four variants, J. Alloys Compd. 610 (2014) 623-629. [64] A. Kverneland, V. Hansen, R. Vincent, K. Gjønnes, J. Gjønnes, Structure analysis of embedded nano-sized particles by precession electron diffraction. η′-precipitate in an Al–Zn–Mg alloy as example, Ultramicroscopy 106(6) (2006) 492-502. [65] Y.-Y. Li, L. Kovarik, P.J. Phillips, Y.-F. Hsu, W.-H. Wang, M.J. Mills, High-resolution characterization of the precipitation behavior of an Al–Zn–Mg–Cu alloy, Philos. Mag. Lett. 92(4) (2012) 166-178. [66] X. Hou, G. Ma, P. Bai, F. Lang, X. Zhao, F. Liu, Y. Xing, Investigation of the Coherent Strain Evolution of the η'phase in Al–Zn–Mg–Cu alloys via scanning transmission electron microscopy, J. Alloys Compd. 856 (2021) 158111. [67] C. Wolverton, Crystal structure and stability of complex precipitate phases in Al–Cu–Mg–(Si) and Al–Zn–Mg alloys, Acta Mater. 49(16) (2001) 3129-3142. [68] T.-F. Chung, Y.-L. Yang, C.-L. Tai, M. Shiojiri, C.-N. Hsiao, C.-S. Tsao, W.-C. Li, Z. Shi, J. Lin, H.-R. Chena, HR-STEM investigation of atomic lattice defects in different types of η precipitates in creep-age forming Al–Zn–Mg–Cu aluminium alloy, Materials Science and Engineering: A 815 (2021) 141213. [69] J. Chen, L. Zhen, S. Yang, W. Shao, S. Dai, Investigation of precipitation behavior and related hardening in AA 7055 aluminum alloy, Materials Science and Engineering: A 500(1-2) (2009) 34-42. [70] A. Bendo, K. Matsuda, S. Lee, K. Nishimura, N. Nunomura, H. Toda, M. Yamaguchi, T. Tsuru, K. Hirayama, K. Shimizu, Atomic scale HAADF-STEM study of η′ and η 1 phases in peak-aged Al–Zn–Mg alloys, J. Mater. Sci. 53 (2018) 4598-4611. [71] H.P. Degischer, W. Lacom, A. Zahra, C.Y. Zahra, Decomposition Processes in an Al-5% Zn-1% Mg Alloy, Part Il: Electronmicroscopic Investigations 71(4) (1980) 231-238. [72] H. Löffler, I. Kovacs, J. Lendvai, Decomposition processes in al-zn-mg alloys, J. Mater. Sci. 18 (1983) 2215-2240. [73] D. Raabe, B. Sun, A. Kwiatkowski Da Silva, B. Gault, H.-W. Yen, K. Sedighiani, P. Thoudden Sukumar, I.R. Souza Filho, S. Katnagallu, E. Jägle, Current challenges and opportunities in microstructure-related properties of advanced high-strength steels, Metallurgical and Materials Transactions A 51 (2020) 5517-5586. [74] T. Gladman, Precipitation hardening in metals, Mater. Sci. Technol. 15(1) (1999) 30-36. [75] Y. Zhao, X. Liao, Z. Jin, R. Valiev, Y.T. Zhu, Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing, Acta Mater. 52(15) (2004) 4589-4599. [76] A. Bendo, K. Matsuda, A. Lervik, T. Tsuru, K. Nishimura, N. Nunomura, R. Holmestad, C.D. Marioara, K. Shimizu, H. Toda, An unreported precipitate orientation relationship in Al-Zn-Mg based alloys, Mater. Charact. 158 (2019) 109958. [77] C.D. Marioara, W. Lefebvre, S.J. Andersen, J. Friis, Atomic structure of hardening precipitates in an Al–Mg–Zn–Cu alloy determined by HAADF-STEM and first-principles calculations: Relation to η-MgZn 2, J. Mater. Sci. 48 (2013) 3638-3651. [78] W. Huo, L. Hou, Y. Zhang, J. Zhang, Warm formability and post-forming microstructure/property of high-strength AA 7075-T6 Al alloy, Materials Science and Engineering: A 675 (2016) 44-54. [79] A.I.H. Committee, A.S.f.M.H.T. Division, Heat treating, ASM international1991. [80] M. Kumar, N. Ross, Influence of temper on the performance of a high-strength Al–Zn–Mg alloy sheet in the warm forming processing chain, J. Mater. Process. Technol. 231 (2016) 189-198. [81] M. Kumar, C. Poletti, H.P. Degischer, Precipitation kinetics in warm forming of AW-7020 alloy, Materials Science and Engineering: A 561 (2013) 362-370. [82] Y.-S. Lee, D.-H. Koh, H.-W. Kim, Y.-S. Ahn, Improved bake-hardening response of Al-Zn-Mg-Cu alloy through pre-aging treatment, Scr. Mater. 147 (2018) 45-49. [83] J. Werenskiold, A. Deschamps, Y. Bréchet, Characterization and modeling of precipitation kinetics in an Al–Zn–Mg alloy, Materials Science and Engineering: A 293(1-2) (2000) 267-274. [84] K. Omer, A. Abolhasani, S. Kim, T. Nikdejad, C. Butcher, M. Wells, S. Esmaeili, M. Worswick, Process parameters for hot stamping of AA7075 and D-7xxx to achieve high performance aged products, J. Mater. Process. Technol. 257 (2018) 170-179. [85] J.C. Williams, E.A. Starke Jr, Progress in structural materials for aerospace systems, Acta Mater. 51(19) (2003) 5775-5799. [86] K. Iakoubovskii, K. Mitsuishi, Y. Nakayama, K. Furuya, Thickness measurements with electron energy loss spectroscopy, Microsc. Res. Tech. 71(8) (2008) 626-631. [87] H.-R. Zhang, R.F. Egerton, M. Malac, Local thickness measurement through scattering contrast and electron energy-loss spectroscopy, Micron 43(1) (2012) 8-15. [88] T. Malis, S. Cheng, R. Egerton, EELS log‐ratio technique for specimen‐thickness measurement in the TEM, Journal of electron microscopy technique 8(2) (1988) 193-200. | - |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/88961 | - |
dc.description.abstract | 本篇論文探討7075鋁合金之熱處理對於析出物及機械性質的影響,藉由不同時間之人工時效,比較出對於後續之溫成型與烤漆熱處理之影響,透過量化析出物以及觀察析出物之演化,詳細探討析出物經過不同熱處理對於析出強化的貢獻。
於人工時效的階段,主要析出強化相為η' 析出物,透過穿透式顯微鏡 (Transmission Electron Microscope, TEM)量化析出物,探討尺寸大小、數量密度、與體積分率對於機械性質引響,並且利用TEM進行析出物鑑定。量化結果分析顯示尺寸大小、數量密度、與體積分率隨人工時效時間增長而增加,因此T6時效階段達到最高機械強度。除此之外,透過量化析出物可得人工時效能增加η' 析出物的熱穩定性,引響後續溫成型與烤漆熱處理之析出行為。 透過量化分析,可得η' 析出物經人工時效十小時與溫成型及烤漆熱處理可得最大尺寸約5 nm之長度,且機械強度接近T6時效階段,而超過十小時之人工時效後,進行溫成型與烤漆熱處理導致η' 析出物尺寸、數量密度、與體積分率遞減,因為較長人工時效使析出物具有穩定性,所以在溫成型階段不易熔回基地,導致烤漆階段之η' 為新析出,而具有穩定性之η' 析出則生長成η 析出物,從量化分析結果也可得知η 析出物之尺寸、數量密度、與體積分率都在增加。 | zh_TW |
dc.description.abstract | This study investigates the influence of heat treatments on the precipitation behaviors and mechanical properties in 7075 aluminum alloys. Various time durations of artificial aging time are conducted to observe the effect of artificial aging on warm forming and paint baking heat treatments. By quantifying precipitates and observing precipitation evolutions, this research discusses the strengthening of precipitates undergoing through artificial aging followed by warm forming and paint baking heat treatments.
η' precipitates are the dominant strengthening phase during artificial aging stage. Thus, Transmission Electron Microscopy is utilized to analyze and quantify the sizes, number density, and the volume percent of η' precipitates regarding to the mechanical properties. Meanwhile, TEM also identifies the structure of the precipitates. The quantification result showed that the sizes, number density, and the volume percent of η' precipitates increase with longer artificial aging time. Hence, T6 heat treatments yield the highest mechanical strength. Meanwhile, η' precipitates gain thermal stability according to quantifying results affecting the precipitation behavior during warm forming and paint baking heat treatments. Precipitation quantification results showed that artificial ageing for ten hours followed by warm forming and paint baking heat treatment resulted η' precipitates achieving the largest size about 5 nm, yielding mechanical strength near T6 levels. Meanwhile, artificial aging over ten hours followed by warm forming and paint baking heat treatments cause η' precipitates to decrease in sizes, number density, and the volume percent. Since η' precipitates are more thermal stable with longer artificial aging treatments. Thus, η' precipitates and GP zones are not easily dissolved into the matrix during warm forming stage. Longer artificial aging followed by warm forming and paint baking resulted newly formed η' precipitates while stable η' precipitates transform into η precipitates during paint baking treatment. Hence, quantification result showed an increase of size, number density, and the volume percent for η precipitates. | en |
dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-08-16T16:32:43Z No. of bitstreams: 0 | en |
dc.description.provenance | Made available in DSpace on 2023-08-16T16:32:43Z (GMT). No. of bitstreams: 0 | en |
dc.description.tableofcontents | 口試委員會審定書
國立臺灣大學工學院材料科學與工程學系 1 誌謝 I 中文摘要 III ABSTRACT IV CONTENTS VI LIST OF FIGURES IX LIST OF TABLES XV CHAPTER 1 INTRODUCTION 1 CHAPTER 2 LITERATURE REVIEW 2 2.1 ADVANCEMENTS IN ALUMINUM ALLOYS 2 2.1.1 Introduction of Aluminum Alloys 2 2.1.2 Heat treatments in Aluminum Alloys 3 2.1.3 Addition of solute elements in AA7075 10 2.2 IDENTIFICATION OF PRECIPITATES IN AA7075 13 2.2.1 Introduction to Precipitates in AA7075 13 2.2.2 GP zones 14 2.2.3 η' and η precipitates 22 2.2.4 Precipitation hardening mechanism 26 2.3 QUANTIFYING PRECIPITATES IN TEM IMAGES 29 2.3.1 Introduction to quantifying precipitates in AA7075 29 2.3.2 Observation by transmission electron microscopy 30 2.4 EFFECT OF VARIOUS ARTIFICIAL AGING CONDITIONS ON WARM FORMING AND PAINT BAKING HEAT TREATMENTS 31 CHAPTER 3 EXPERIMENT PROCEDURE 38 3.1 MATERIAL 38 3.2 HEAT TREATMENTS 38 3.3 ANALYSIS METHODS 39 3.3.1 Vickers Hardness Tester 39 3.3.2 Tensile Test 40 3.3.3 Transmission Electron Microscope (TEM) 40 3.3.4 Electron Energy Loss Spectrum (EELS) 41 CHAPTER 4 MICROSTRUCTURE ANALYSIS OF PREAGED AA7075 FOLLOWED BY WARM FORMING AND PAINT BAKING 42 4.1 ARTIFICIAL AGING 42 4.1.1 Hardness test 42 4.1.2 Tensile test 43 4.1.3 TEM analysis 45 4.1.4 HRTEM analysis 52 4.1.5 EELS analysis 54 4.1.6 Conclusion 56 4.2 WARM FORMING 58 4.3 PAINT BAKING 63 4.3.1 Hardness test 63 4.3.2 Tensile test 64 4.3.3 TEM analysis 66 4.3.4 HRTEM analysis 74 4.3.5 EELS analysis 79 4.3.6 Conclusion 83 CHAPTER 5 HIGHLIGHTS 87 CHAPTER 6 FUTURE WORK 89 REFERENCE 90 | - |
dc.language.iso | en | - |
dc.title | AA7075 鋁合金之人工時效對溫成形及烤漆之奈米析出物以及機械性質研究 | zh_TW |
dc.title | A study on Precipitation evolution and Mechanical property of artificial aged AA7075 followed by warm forming and paint baking treatment | en |
dc.type | Thesis | - |
dc.date.schoolyear | 111-2 | - |
dc.description.degree | 碩士 | - |
dc.contributor.oralexamcommittee | 蘇德徵;鍾采甫;王樂民 | zh_TW |
dc.contributor.oralexamcommittee | Te-Cheng Su;Tsai-Fu Chung;La-Ming Wang | en |
dc.subject.keyword | AA7075 鋁合金,η' 析出物,η 析出物,T6 時效,GP zone,穿透式電子顯微鏡,溫成形及烤漆, | zh_TW |
dc.subject.keyword | AA7075 aluminum alloys,η' precipitates,η precipitates,T6 artificial aging,GP zone,TEM,Warm forming and paint baking, | en |
dc.relation.page | 94 | - |
dc.identifier.doi | 10.6342/NTU202302816 | - |
dc.rights.note | 同意授權(全球公開) | - |
dc.date.accepted | 2023-08-09 | - |
dc.contributor.author-college | 工學院 | - |
dc.contributor.author-dept | 材料科學與工程學系 | - |
顯示於系所單位: | 材料科學與工程學系 |
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