FATIGUE PROPERTIES FOR 20G AND 2.25Cr-1Mo STEELS AFTER HYDROGEN ATTACK
LI Jianli; LI Xiaogang;XIE Genshuan; YAO Zhiming ; LI Jin; KE Wei(Corroston Science Laboratory; Instate of Corrosion and Protection of Metals; Chinese A cedemy of Sciences; Shenyang; 110015)(Manuscript received 94-07-22)
Cite this article:
LI Jianli; LI Xiaogang;XIE Genshuan; YAO Zhiming ; LI Jin; KE Wei(Corroston Science Laboratory; Instate of Corrosion and Protection of Metals; Chinese A cedemy of Sciences; Shenyang; 110015)(Manuscript received 94-07-22). FATIGUE PROPERTIES FOR 20G AND 2.25Cr-1Mo STEELS AFTER HYDROGEN ATTACK. Acta Metall Sin, 1995, 31(13): 26-30.
Abstract The mechanical properties and fatigue crack growth behaviour for 20G and 2.25Cr-1Mo steels after hydrogen attack have been investigated. The microstructure after hydrogen attack and the propagation path of fatigue crack have been observed by optical microscopy. The results showed that hydrogen attack resulted in an obvious increase in fatigue crack growth rate for 20G steel;however, the threshold △K value decreased at the beginning of hydrogen attack, and increased at the successive stage for the same material.The 2.25Cr-1Mo steel showed a lower susceptibility to hydrogen attack due to the action of element Cr and Mo, not resulting in a significant change in fatigue crack behaviour.It is suggested that the increase in the threshold △K value could be attributed to the crack closure effect caused by the tortuous cracking path. Correspondent; LI Jianli, Instrtute of Corration and Protection of Metall, Chinese Academy of Sciences ,Shenyang 110015)
SU Tiejian; LUO Xinghong; FAN Cungan; LI Yiyi (Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015)CHEN Xiao; GUO Aimin (Wuhan Iron and Steel Company; Wuhan 430080)Correspondent: SU Tiejian; Fax: 024-3891320; Tel. 024-3843531-55445)(Manuscript received 1997-04-30; in revised form 1997-07-08). TEMPERING PRECIPITATES OF STEEL 1.25Cr-0.5Mo AND THEIR EFFECTS ON ITS HYDROGEN ATTACK RESISTANCE[J]. 金属学报, 1998, 34(4): 393-399.
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CHEN Wenzhe;ZHANG Sa;QIAN Kuangwu (Department of Materials; Fuzhou University; Fuzhou 350002)GU Haicheng (Institute of Materials; Xi'an Jiaotong University; Xi'an 710049)WANG Zhongguang (State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015). FATIGUE CRACK GROWTH RATES AND FATIGUE THRESHOLDS OF CENTRIFUGAL SPRAY DEPOSITED Ti-48Al-2Mn-2Nb[J]. 金属学报, 1998, 34(1): 70-74.
WEI Xuejun; LI Jin; KE Wei(State Key Laboratory of Corrosion and Protection; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 110015); (State Key Laboratory of Fatigue and Fracture of Materials; Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110015)(Manuscript received 1995-08-23). INFLUENCE OF SUPERPOSED SMALL LOADS ON FATIGUE CRACK PREPAGATION RATE OF A537 STEEL[J]. 金属学报, 1996, 32(5): 504-509.
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