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研究生:劉珀瑋
研究生(外文):Po-Wei Liu
論文名稱:IF鋼與2205雙相不銹鋼氫脆性研究
論文名稱(外文):The Study of Hydrogen Embrittlement of IF Steel and 2205 Duplex Stainless Steel
指導教授:吳建國吳建國引用關係
指導教授(外文):Jiann-Kuo Wu
學位類別:碩士
校院名稱:國立海洋大學
系所名稱:材料工程研究所
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:139
中文關鍵詞:雙相不銹鋼IF鋼氫脆性
外文關鍵詞:Duplex stainless steelInterstitial free steelHydrogen embrittlement
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本研究分成兩部分:第一部份為2205雙相不銹鋼氫脆性研究,試片以不同的定電流密度、時間充氫及不同的應變率下拉伸,比較其差異和探討產生破裂的起始位置。第二部份為冷軋量對IF鋼氫敏感性之影響。
根據氫原子微印實驗之結果,發現氫原子在2205雙相不銹鋼內部擴散的方式為晶格擴散,且在肥粒鐵相中之氫滲透速率及擴散速率高於沃斯田鐵相。由預充氫的試片破斷面觀察,在肥粒鐵相和沃斯田鐵相中皆有脆性破斷的現象,且發現其破裂形式為穿晶破裂。
由金相組織及破斷面觀察發現,經過冷軋後的IF鋼,由於吸收氫原子進而助長穿晶破裂的發生。這些結果顯示經冷軋後的含鈦的IF鋼其對氫所造成的破壞是相當敏感的。
The first part of this study is hydrogen embrittlement of 2205 duplex stainless steel. The second part, the role of plastic deformation by cold work on the hydrogen susceptibility of Ti-bearing interstitial free steel.
Hydrogen embrittlement of 2205 duplex stainless steel has been evaluated using electrochemical permeation measurement, hydrogen microprint technique and tensile test in this study. Due to hydrogen transport in 2205 duplex stainless steel is mainly lattice diffusion in ferritic phase and was confirmed hydrogen microprint technique, more hydrogen distribution, higher permeation rate and diffusion in ferritic phase were detected. Brittle fracture was observed in both the ferritic and austenitic phases of hydrogen precharged specimen.
Permeation trapping and mechanical property effects were studied as a function of cold work for the interstitial free steel with extra-deep drawing quality. Metallographic and fractographic investigations revealed that hydrogen absorption promoted transgranular fracture in cold rolled specimen. These results show that the cold rolled interstitial free steel are susceptible to hydrogen embrittlement.
目錄……………………………………………………………………….Ⅰ
圖目錄…………………………………………………………………….Ⅱ
表目錄…………………………………………………………………….Ⅴ
中文摘要…………………………………………………………………..1
英文摘要…………………………………………………………………..2
第一章 文獻回顧………………………………………………………...3
1.1 氫脆化理論……………………………………………………3
1.2 電化學氫滲透理論…………………………………………..16
1.3 氫原子微印技術……………………………………………..20
1.4 參考文獻……………………………………………………..23
第二章 2205雙相不銹鋼氫脆性研究………………………………….44
2.1 文獻回顧…………………………………………………..44
2.2 實驗步驟…………………………………………………..55
2.3 結果與討論………………………………………………..59
2.4 結論………………………………………………………..67
2.5 參考文獻…………………………………………………..69
第三章 冷軋量對IF鋼氫敏感性之影響……………………………..101
3.1 文獻回顧…………………………………………………101
3.2 實驗步驟…………………………………………………103
3.3 結果與討論………………………………………………108
3.4 結論………………………………………………………111
3.5 參考文獻…………………………………………………112
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