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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/15218完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林新智(Hsin-Chih Lin) | |
| dc.contributor.author | Shih-Chieh Kao | en |
| dc.contributor.author | 高士傑 | zh_TW |
| dc.date.accessioned | 2021-06-07T17:28:37Z | - |
| dc.date.copyright | 2020-06-09 | |
| dc.date.issued | 2019 | |
| dc.date.submitted | 2020-05-06 | |
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Springer, Berlin, Heidelberg, 1978. 321-348. 49. Depover, Tom, et al. 'Effect of Ti, Mo and Cr based precipitates on the hydrogen trapping and embrittlement of Fe–C–X Q&T alloys.' International journal of hydrogen energy 40.47 (2015): 16977-16984. 50. Depover, Tom, and Kim Verbeken. 'The detrimental effect of hydrogen at dislocations on the hydrogen embrittlement susceptibility of Fe-CX alloys: An experimental proof of the HELP mechanism.' international journal of hydrogen energy 43.5 (2018): 3050-3061. 51. Hagi, Hideki. 'Effect of Substitutional Alloying Elements (Al, Si, V, Cr, Mn, Co, Ni, Mo) on Diffusion Coefficient of Hydrogen in α-Iron.' Materials Transactions, JIM 33.5 (1992): 472-479. 52. Birnbaum, Howard K., and Petros Sofronis. 'Hydrogen-enhanced localized plasticity—a mechanism for hydrogen-related fracture.' Materials Science and Engineering: A 176.1-2 (1994): 191-202. 53. Ferreira, P. J., I. M. Robertson, and H. K. Birnbaum. 'Hydrogen effects on the interaction between dislocations.' Acta materialia46.5 (1998): 1749-1757. 54. Taketomi, Shinya, Ryosuke Matsumoto, and Noriyuki Miyazaki. 'Atomistic study of the competitive relationship between edge dislocation motion and hydrogen diffusion in alpha iron.' Journal of Materials Research 26.10 (2011): 1269-1278. 55. Momotani, Yuji, et al. 'Effect of strain rate on hydrogen embrittlement in low-carbon martensitic steel.' International Journal of Hydrogen Energy 42.5 (2017): 3371-3379. 56. Westlake, D. G. GENERALIZED MODEL FOR HYDROGEN EMBRITTLEMENT. Argonne National Lab., Ill., 1969. 57. Birnbaum, H. K. 'Mechanical properties of metal hydrides.' Journal of the Less Common Metals 104.1 (1984): 31-41. 58. Birnbaum, Howard K. Mechanisms of hydrogen related fracture of metals. ILLINOIS UNIV AT URBANA DEPT OF MATERIALS SCIENCE AND ENGINEERING, 1989.. 59. Birnbaum, H. K., et al. 'Mechanisms of hydrogen related fracture--a review.' 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'Whitney award lecture—1987: hydrogen—the versatile embrittler.' Corrosion 43.7 (1987): 390-397. 66. Chen, X. G. W. W., and W. W. Gerberich. 'The kinetics and micromechanics of hydrogen assisted cracking in Fe-3 pct Si single crystals.' Metallurgical Transactions A 22.1 (1991): 59-70. 67. Moody, Neville R., et al. 'Hydrogen Effects on Material Behavior and Corrosion Deformation Interactions.' TMS, Warrendale, PA(2003). 68. Beachem, C. D. 'A new model for hydrogen-assisted cracking (hydrogen “embrittlement”).' Metallurgical and Materials Transactions B 3.2 (1972): 441-455. 69. Sofronis, Petros, and Howard K. Birnbaum. 'Mechanics of the hydrogendashdislocationdashimpurity interactions—I. Increasing shear modulus.' Journal of the Mechanics and Physics of Solids43.1 (1995): 49-90. 70. Murakami, Yukitaka, and Saburo Matsuoka. 'Effect of hydrogen on fatigue crack growth of metals.' Engineering Fracture Mechanics 77.11 (2010): 1926-1940. 71. Choo, W. Y., and Jai Young Lee. 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'Design simulation of kinetics of multicomponent grain boundary segregations in the engineering steels under quenching and tempering.' Modeling and Simulation for Material Selection and Mechanical Design. CRC Press, 2003. 69-132. 78. Shibata, Akinobu, et al. 'Fracture surface topography analysis of the hydrogen-related fracture propagation process in martensitic steel.' International Journal of Fracture 205.1 (2017): 73-82. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/15218 | - |
| dc.description.abstract | YOKE 8625MX 的設計在性質上主要有幾點要求：良好的硬化能、高強度與
高衝擊韌性，且希望能減少回火脆性。YOKE 8625MX在喬米尼實驗中可以得知，即使在冷卻速度最慢的一端，依舊保有40 HRC 以上的硬度，代表具有良好的硬化能。YOKE 8625MX 在水淬態下具有高於1800 MPa 的高強度，在-40 °C 下衝擊韌性達40 J 以上，且在回火後並無明顯回火脆性。600 °C 回火態具有1109 MPa的高強度，其原因應該為二次強化效應。 麻田散鐵鋼屬於較容易受到氫脆效應影響的材料，故評估各熱處理狀態下的抗氫脆能力是相當重要的。本實驗藉由陰極電化學充氫將氫充入材料內，綜合SEM、TEM、拉伸實驗與熱脫氫實驗結果，以推測YOKE 8625MX 顯微結構與氫脆現象的關聯。由實驗結果可得，水淬態與200 °C 回火態下，主要氫捕集位置為差排；在400 °C 回火態下，氫捕集位置為差排與雪明碳鐵；在600 °C 回火態下，氫捕集位置為差排、雪明碳鐵與M7C3，其中差排與雪明碳鐵為較弱的氫捕集位置，M7C3 為較強的氫捕集位置。 水淬態有著0.96 ppm 最高的吸氫量與最差的抗氫脆能力；200 °C 回火態與400 °C 回火態的吸氫量下降至0.6 ppm，拉伸曲線能達降伏強度，抗氫脆能力較強；600 °C 回火態雖然有著0.95 ppm 的高吸氫量，但較低的差排密度與較強的氫捕集位置M7C3，使得600 °C 回火態有著最佳的抗氫脆能力，充氫拉伸延伸率可達14 %。 | zh_TW |
| dc.description.abstract | There are some requirements for the design of YOKE 8625MX：good hardenability, high strength and high impact energy. Also, the reduction of tempered embrittlement is expected. By Jominy test, the part of sample with lowest cooling rate
still possesses hardness over 40 HRC, which means that YOKE 8625MX actually has good hardenability. The UTS of YOKE 8625MX reaches 1800 MPa in quench state, and the impact energy reaches 40 J at -40 °C. Moreover, tempered embrittlement is slight. 600 °C tempered state still reaches 1099 MPa. Therefore, secondary hardening is expected. Martensitic steels are prone to hydrogen embrittlement, so the assessment of resistance of hydrogen embrittlement is important. In this study, hydrogen would be charged into steels by electrochemical method. By combining the results of SEM, TEM, tensile test and TDS, the relationship between microstructure and hydrogen embrittlement can be clarified. Results shows that the dominant trapping site of quench state and 200 °C tempered state is dislocation; dislocation and cementite in 400 °C tempered state; dislocation, cementite and M7C3 in 600 °C tempered state. Compared with dislocation and cementite, the activation energy of M7C3 is higher. Quench state shows the poorest resistance of hydrogen embrittlement with the highest hydrogen content, 0.96 ppm. The hydrogen content drops to around 0.6 ppm in 200 °C tempered state and 400 °C tempered state, with improvement on resistance of hydrogen embrittlement. Although 600 °C tempered state has high hydrogen content, 0.95 ppm. For the lower dislocation density and stronger trapping sites, M7C3, 600 °C tempered state shows the best resistance of hydrogen embrittlement. 14 % elongation can be got after charging. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-07T17:28:37Z (GMT). No. of bitstreams: 1 ntu-108-R06527005-1.pdf: 6880318 bytes, checksum: 2feb542e17306c8b4465f855261ae98f (MD5) Previous issue date: 2019 | en |
| dc.description.tableofcontents | 誌謝........................... I
摘要........................... II Abstract ..................... III 目錄........................... V 圖目錄......................... VIII 表目錄......................... X 第一章 前言..................... 1 第二章 文獻回顧................. 2 2.1 YOKE 8625MX 介紹 .......... 2 2.2 合金添加................... 3 2.2.1 碳....................... 3 2.2.2 矽........................3 2.2.3 錳....................... 3 2.2.4 鎳....................... 3 2.2.5 鋁....................... 4 2.2.6 磷、硫................... 4 2.2.7 鉻....................... 4 2.2.8 硼....................... 4 2.2.9 鉬....................... 5 2.2.10 鈦.......................6 2.3 鋼鐵介紹.................... 7 2.3.1 麻田散鐵鋼................ 7 2.3.2 麻田散鐵形貌.............. 9 2.3.3 麻田散鐵相變化起始溫度(Ms) ... 9 2.3.4 殘留沃斯田鐵................ 11 2.4 麻田散鐵回火處理............... 13 2.4.1 低溫回火(< 200 °C) ......... 13 2.4.2 中溫回火(200 °C~400 °C) ................ 14 2.4.3 高溫回火(>400 °C) ................ 15 2.4.4 二次硬化析出相[10] ..................... 16 2.4.5 差排密度......................... 17 2.5 氫脆現象........................ 18 2.6 氫進入材料途徑......................... 19 2.6.1 氫氣環境(氫分子) ............... 19 2.6.2 溶液(氫離子) ........................ 20 2.6.3 幫助氫進入材料的物質........ 20 2.7 氫捕集位置........................... 21 2.8 氫的擴散.............................. 22 2.9 氫脆理論............................. 26 2.9.1 氫化物形成理論(Hydride formation and fracture) ..26 2.9.2 內壓理論(Internal pressure) ............ 27 2.9.3 氫致鍵結弱化理論(Hydrogen enhanced decohesion) .. 28 2.9.4 氫致局部塑性變形理論(Hydrogen enhanced local plasticity) ...... 29 2.10 熱脫氫(Thermal desorption spectroscopy) ..... 32 2.11 破斷面特徵....... 34 2.11.1 渦穴(Dimple) ....... 34 2.11.2 劈裂(Cleavage) ...... 36 2.11.3 半劈裂(Quasi-cleavage) ................... 36 2.11.4 沿晶.................. 37 2.11.5 氫脆破斷面.................. 38 第三章 實驗方法............................ 40 3.1 實驗目的與流程..................... 40 3.2 分光分析儀(OES) ............. 41 3.3 熱膨脹儀(DIL) ............... 41 3.4 拉伸試驗、衝擊試驗式棒加工................. 41 3.5 熱處理........................ 42 3.6 硬度實驗.......................... 43 3.7 喬米尼實驗....................... 43 3.8 SEM 觀察 .......... 44 3.9 TEM 觀察 ........................ 44 3.10 電化學充氫............................ 44 3.11 電化學鍍鋅......................... 45 3.12 拉伸實驗.................... 45 3.13 衝擊實驗............................. 45 3.14 熱脫氫分析........................ 46 第四章 結果與討論............ 47 4.1 合金成分...................... 47 4.2 熱膨脹儀實驗.................. 47 4.3 喬米尼硬化能實驗......... 48 4.4 SEM 金相觀察 ............ 49 4.5 TEM 觀察 .................. 51 4.5.1 水淬態與200 °C 回火態TEM 觀察 ............... 51 4.5.2 400 °C 回火態TEM 觀察 ................. 52 4.5.3 600 °C 回火態TEM 觀察 .......................... 54 4.5.4 差排密度定量............... 56 4.6 機械性質........................... 58 4.6.1 拉伸實驗.................. 58 4.6.2 硬度實驗................. 60 4.6.3 衝擊實驗................. 60 4.7 熱脫氫分析.......................... 62 4.7.1 熱脫氫分析-氫含量 ....................... 62 4.7.2 熱脫氫分析-活化能 ........................ 62 4.8 充氫拉伸................ 67 4.9 破斷面觀察................. 72 第五章 結論.......................... 78 第六章 參考資料............. 80 | |
| dc.language.iso | zh-TW | |
| dc.subject | YOKE 8625MX | zh_TW |
| dc.subject | 熱脫氫 | zh_TW |
| dc.subject | 氫脆 | zh_TW |
| dc.subject | M7C3 | zh_TW |
| dc.subject | 回火處理 | zh_TW |
| dc.subject | 麻田散鐵鋼 | zh_TW |
| dc.subject | martensitic steel | en |
| dc.subject | TDS | en |
| dc.subject | hydrogen embrittlement | en |
| dc.subject | M7C3 | en |
| dc.subject | YOKE 8625MX | en |
| dc.subject | tempering | en |
| dc.title | 回火熱處理對YOKE 8625MX鋼的機械性質與氫脆性質影響 | zh_TW |
| dc.title | Influence of tempering treatment on mechanical properties and the hydrogen embrittlement of YOKE 8625MX steel | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 108-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 薛人愷(Ren-Kae Shiue),蔡履文(Lu-Wen Tsay),顏鴻威(Hung-Wei Yen) | |
| dc.subject.keyword | YOKE 8625MX,麻田散鐵鋼,回火處理,M7C3,氫脆,熱脫氫, | zh_TW |
| dc.subject.keyword | YOKE 8625MX,martensitic steel,tempering,M7C3,hydrogen embrittlement,TDS, | en |
| dc.relation.page | 87 | |
| dc.identifier.doi | 10.6342/NTU202000789 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2020-05-06 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 材料科學與工程學研究所 | zh_TW |
| 顯示於系所單位： | 材料科學與工程學系 | |
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