金属学报  1997, Vol. 33 Issue (8): 824-830

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Cu双晶的循环形变行为与疲劳裂纹萌生Ⅱ.疲劳裂纹萌生与早期扩展

胡运明;王中光

中国科学院金属研究所材料疲劳与断裂国家重点实验室;沈阳;110015;中国科学院金属研究所材料疲劳与断裂国家重点实验室;沈阳;110015

CYCLIC DEFORMATION BEHAVIOR AND FATIGUE CRACK INITIATION IN COPPER BICRYSTALS

II. Fatigue Crack Initiation and Early Growth HU Yunming; WANG Zhongang (State Key Laboratory for Fatigue and Fracture of Materials; Institute ofMetal Research; Chinese Academy of Sciences; Shenyang 110015) (Manuscript received 1996-09-12; in revised form 1997-03-07)

胡运明;王中光. Cu双晶的循环形变行为与疲劳裂纹萌生Ⅱ.疲劳裂纹萌生与早期扩展[J]. 金属学报, 1997, 33(8): 824-830.
, . CYCLIC DEFORMATION BEHAVIOR AND FATIGUE CRACK INITIATION IN COPPER BICRYSTALS[J]. Acta Metall Sin, 1997, 33(8): 824-830.

摘要 参考文献 相关文章 Metrics 全文: PDF(3700 KB)   摘要: 用扫描电镜（SEM）观察了受应变疲劳载荷作用的Cu双晶的表面形貌，发现晶界是疲劳形变双晶最有利的裂纹萌生地点．在滑移带撞击晶界的地方，特别是在几条粗滑移带共同撞击晶界的地方观察到许多疲劳微裂纹；并且发现与平行晶界双晶相比，垂直晶界双晶中极有利于疲劳裂纹沿晶界作早期扩展一种PSB－GB疲劳裂纹萌生机制可用来解释这些沿晶疲劳裂纹的形成． 关键词 ： Cu双晶,  疲劳裂纹萌生,  疲劳裂纹早期扩展     Abstract：Surface morphology of fatigued copper bicrystals was investigated by a scan-ning electron microscopy(SEM). It was found that the grain boundaries are the preferred sites for fatigue crack initiation in the fatigued bicrystals. A large number of fatigue microcracks was observed at the sites of grain boundaries where slip bands impinged, especially at the sites where several intense slip bands impinged. And it was found that, compared with the bicrystal specimens with a grain boundary parallel to loading axis, the bicrystal specimens with a grain boundary perpendicular to loading axis are quite favorable for the fatigue crack early growth along grain boundary. A PSB-GB model of fatigue crack initiation can be used to explain the initiation of the intergranular fatigue cracks. Key words： Cu bicrystal    fatigue crack initiation    fatigue crack early growth 收稿日期: 1997-08-18      基金资助:国家自然科学基金!19392300－4 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 胡运明 王中光 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1997/V33/I8/824 1 Cheng A S, Laird C. Fatigue Eng Maler Struct, 1981; 4: 331 2 Basinski Z S, Basinski S J. Scr Metall,1984; 18: 851 3 Hunsche A, Neumann P. Ac,a Metall,1986; 34: 207 4 Ma B T, Laird C. Acta Metall ,1989; 37: 325 5 Ma B T, Laird C. Acta Metall.1989; 37: 337 6 Winter A T, Pederson O B, Rasmussen K V. Acta Metall, 1981; 29: 735 7 Wang Z, Laird C. Mater Sci Eng,1988; A100:57 8 Liu C D, Bassim M N, You D X. Acta Metall Mater, 1994; 42; 3695 9 Katagirik K, Omura A, Koyanagik, Awatani J, Shiraishi T, Kaneshiro H. Metall Trans, 1977; 8A:1769 10 Mughrabi H, Wang R, Differt k, Essmann U. ASTM STP, 1983; 811: 5 11 Kim W H, Laird C. Acta Metall,1978; 26: 789 12胡运明,王中光.金属学报, 1997; 33: 814 13 Essmann U, Gosele U, Mughrabi H. Philos Mag, 1981; A44: 405 14 Christ H-J. Mater Sci Eng, 1989; A117. L25-L29 [1] 李细锋, 李天乐, 安大勇, 吴会平, 陈劼实, 陈军. 钛合金及其扩散焊疲劳特性研究进展[J]. 金属学报, 2022, 58(4): 473-485. [2] 钱桂安 洪友士. 环境介质对40Cr结构钢高周和超高周疲劳行为的影响[J]. 金属学报, 2009, 45(11): 1356-1363. [3] 王习术; 梁锋; 曾燕屏; 谢锡善 . 夹杂物对超高强度钢低周疲劳裂纹萌生及扩展影响的原位观测[J]. 金属学报, 2005, 41(12): 1272-1276 . [4] 杨继红; 张新平; Y.W.Mai; 李勇 . 铜单晶循环变形饱和阶段疲劳裂纹萌生及表面区域内应力分布的模拟[J]. 金属学报, 2005, 41(1): 9-. [5] 李勇; 李守新; 李广义 . 疲劳过程中垂直晶界Cu双晶形变带中位错组态与裂纹形核[J]. 金属学报, 2004, 40(5): 462-466 . [6] 胡运明;王中光. 垂直晶界和倾斜晶界Cu双晶的疲劳开裂行为及其机制[J]. 金属学报, 1998, 34(12): 1255-1260. [7] 胡运明;王中光. Cu双晶的循环形变行为与疲劳裂纹萌生Ⅰ.循环形变行为和滑移形貌[J]. 金属学报, 1997, 33(8): 814-823. [8] 冯忠信;张建中;杨建军;陈新增. 金属材料在循环载荷下塑性变形传播对疲劳性能的影响[J]. 金属学报, 1996, 32(3): 261-264. [9] 李广海;张立德. Bi偏聚对[001]对称倾侧Cu双晶晶界脆性的影响[J]. 金属学报, 1995, 31(3): 130-134. [10] 吴建生;林栋粱. 单晶Nb循环变形过程中疲劳裂纹的萌生及其机制[J]. 金属学报, 1995, 31(2): 90-9. Viewed Full text Abstract Cited   Shared      Discussed