金属学报  1987, Vol. 23 Issue (5): 396-402

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40CrNiMoA钢Ⅱ型试样的腐蚀疲劳

褚武扬;肖纪美;赵予生

北京钢铁学院;北京钢铁学院;北京钢铁学院

CORROSION FATIGUE CRACK INITIATION IN A MODE Ⅱ NOTCH SPECIMEN

by CHU Wuyang; XIAO Jimei (C. M. Hsiao); ZHAO Yusheng (Beijing University of Iron and Steel Technology)(Manuscript received 27 August; 1985)

褚武扬;肖纪美;赵予生. 40CrNiMoA钢Ⅱ型试样的腐蚀疲劳[J]. 金属学报, 1987, 23(5): 396-402.
, , . CORROSION FATIGUE CRACK INITIATION IN A MODE Ⅱ NOTCH SPECIMEN[J]. Acta Metall Sin, 1987, 23(5): 396-402.

摘要 参考文献 相关文章 Metrics 全文: PDF(1540 KB)   摘要: 用有限元法通过J积分计算了Ⅱ型试样的应力场强度因子K_Ⅱ·在此基础上,用高强度钢40CrNiMoA Ⅱ型缺口试样研究了疲劳和腐蚀疲劳裂纹形核的规律,并探讨了氢的影响.结果表明,疲劳裂纹不在最大剪应力位置(θ=80°)形核,而是在最大正应力位置(θ=-110°)形核,裂纹取向和最大正应力垂直(α=-80°)。如充氢或在水中腐蚀疲劳,则裂纹形核位置和取向发生了改变,即θ=-85°,α=-55°。动态充氢使缺口形成疲劳裂纹的门槛值从28.8降为10.2MPa·m~(1/2).当△K_Ⅱ较低时,腐蚀疲劳裂纹沿晶形核,这和空气中疲劳时完全不同. Abstract：The stress intensity K_Ⅱ of a mode Ⅱ specimen was calculated using a finite element method via the J integral. The site direction and threshold value for crack initiation from the notch under cyclic mode Ⅱ loading in air, in water and under dynamic charging with hydrogen were investigated. The results showed that the mode Ⅱ fatigue crack in a high strength steel initiated at or close to the site of the maximum principal stress, rather than at the site of the maximum shear stress, and the subsequent crack growth was orientated approximately normal to the direction of the maximum principal stress. The site and direction of crack initiation in water and under dynamic charging with hydrogen were similar but different from that in air. The threshold values for crack initiation in air, in water and under dynamic charging were 28.8, 12.3 and 10.2 MPa·m~(1/2), respectively. The fracture surface of a corrosion fatigue crack in water and under dynamic charging consisted of intergranular facets at low △K_Ⅱ values but of quasi-cleavage at higher △K_Ⅱ values and were different than those in air. 收稿日期: 1987-05-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 褚武扬 肖纪美 赵予生 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I5/396 1 Kocanda S. Fatigue Failure of Metals, Warsaw: Sijthoff and Noordhoff international publishers, 1978 2 Chu W Y (褚武扬), Hsiao C M. (肖纪美), Liu TH (刘天化). Fatigue Eng Mater Struct 1984; 7: 279 3 张统一,褚武扬,肖纪美,李英,金属学报,1986;22:A349． 4 中国航空研究院主编.应力强度因子手册,科学出版社,1981;122 5 Wang YB(王燕斌),chu WY(褚武扬),Hsiao CM(肖纪美).Scr Metall,1985;19:1161 6 张统一,褚武扬,肖纪美.中国科学,A,1986;(3) :316# No related articles found! Viewed Full text Abstract Cited   Shared      Discussed