金属学报  1990, Vol. 26 Issue (1): 38-45

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疲劳断裂过程中渗碳层残余奥氏体的转变

井晓天;楼秉哲;谷臣清;沈福三

陕西机械学院;陕西机械学院材料系;副教授;西安(710048);陕西机械学院;陕西机械学院

TRANSFORMATION OF RETAINED AUSTENITE IN CARBURIZED CASE DURING FATIGUE CRACK GROWTH

JING Xiaotian;LOU Bingzhe;CU Chenqing;SHEN Fusan Shaanxi Institute of Mechanical Engineering Xi'an Dept.of Materils;Shanxi Institute of Mechanical Engineering Xi'an 710048

井晓天;楼秉哲;谷臣清;沈福三. 疲劳断裂过程中渗碳层残余奥氏体的转变[J]. 金属学报, 1990, 26(1): 38-45.
, , , . TRANSFORMATION OF RETAINED AUSTENITE IN CARBURIZED CASE DURING FATIGUE CRACK GROWTH[J]. Acta Metall Sin, 1990, 26(1): 38-45.

摘要 参考文献 相关文章 Metrics 全文: PDF(1143 KB)   摘要: 研究了20CrNiMo钢微氮渗碳层中残余奥氏体的形态,及其在疲劳断裂过程中的转变和作用。结果表明:渗碳层残余奥氏体有薄膜状和块状两种形态,由于界面取向的影响,疲劳裂纹更易于穿过块状奥氏体,促使其发生应变诱发马氏体相变。在疲劳断裂过程中,裂纹面附近的残余奥氏体大部分转变成马氏体,这种转变是在断裂瞬间发生的,与疲劳力学条件无关。转变所引起的体积膨胀增强了裂纹闭合效应。相变诱发闭合是渗碳表层高碳区疲劳裂纹扩张行为的主要因素之一。 关键词 ： 残余奥氏体,  疲劳裂纹扩张,  应变诱发马氏体相变,  相变诱发裂纹闭合     Abstract：The morphology of the retained austenite in the carburized case overthe 20CrNiMo steel and its transformation during fatigue crack propagation throughthe case were investigated by using X-ray and TEM analysis. In the carburizedcase, both film and block shared retained austenite were found. The fatigue crackis inclined to pass through the block shaped retained austenite and thereby stimu-lates its strain-induced martensitic transformation, due to the effect of the orienta-tion relationship between the surfaces. During the process of the fatigue fracture,most of the retained austenite on the crack path are transformed into the marten-site, and the untransformed amounts on the fracture are remained less than 6%. Thetransformation of retained austenite, which is restricted mainly within the plasticzone, occurs only in the time of the fracture, and is independent of external stressesand stress ratios and cyclic numbers. The volume expansion accompanided by itstransformation creates an additional residual displacement of about 0.44μm oncracked surfaces, which is relevent in the magnitude to the plasticity-induced residualdisplacement. The phase transformation induced fatigue crack closure is believed tobe an important factor affecting the fatigue crack behaviors in the high carbonlayer of the carburized case. Key words： retained austenite    fatigue crack growth    strain induced martensite transformation    phase transformation induced crack closure 收稿日期: 1990-01-18      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 井晓天 楼秉哲 谷臣清 沈福三 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1990/V26/I1/38 1 Webster D. ASM Trans Q, 1968; 61: 816 2 Lou Bingzhe (楼秉哲), Averbach B L. Metall Trans, 1983; 14A: 1899 3 井晓天,楼秉哲,沈福三.陕西机械学院学报,1988;(4) :27 4 Gu Chenqing (谷臣清), Lou Bingzhe (楼秉哲), Jing Xiaotian (井晓天), Shen Fusan (沈福三). In: Krauss G ed. Heat Treatment and Surface Engineering, Proc of the 6th International Congress on Heat Treatment of Materials, Chicago: ASM International, 1988: 331 5 Brown W F, Strawley J E. ASTM STP410, 1966: 6 Jing Xiaotian(井晓天), Lou Bingzhe(楼秉哲), Shen Fusan(沈福三). In: Salamak et al., eds. Advance in Fracture Reseach. Vol 11． Huston: Pergamon Press, 1989: 1187--1194 7 徐祖耀.马氏体相变与马氏体,北京:科学出版社,1980 8 Naylor J P, Krahe P R. Metall Trans, 1975; 6A: 594 9 Lindborg U H, Averbach B L. Acta Metall. 1966; 14: 1583 10 田村今男,藤原茂,下冈贞正,成吉幸雄.日本金属学会志,1977;41:280 11 田中実.见:日本热处理技术协会编,热处理基础(Ⅱ),日刊工业新闻社.1970:161 12 Flcck N A. C?ED/C-MATS/TR, 104, Cambridge University, 1984_ [1] 蒋中华, 杜军毅, 王培, 郑建能, 李殿中, 李依依. M-A岛高温回火转变产物对核电SA508-3钢冲击韧性影响机制[J]. 金属学报, 2021, 57(7): 891-902. [2] 刘曼, 胡海江, 田俊羽, 徐光. 变形对超高强贝氏体钢组织和力学性能的影响[J]. 金属学报, 2021, 57(6): 749-756. [3] 罗海文,沈国慧. 超高强高韧化钢的研究进展和展望[J]. 金属学报, 2020, 56(4): 494-512. [4] 田亚强,田耕,郑小平,陈连生,徐勇,张士宏. 淬火配分贝氏体钢不同位置残余奥氏体C、Mn元素表征及其稳定性[J]. 金属学报, 2019, 55(3): 332-340. [5] 邵成伟, 惠卫军, 张永健, 赵晓丽, 翁宇庆. 一种新型高强度高塑性冷轧中锰钢的组织和力学性能[J]. 金属学报, 2019, 55(2): 191-201. [6] 潘栋, 赵宇光, 徐晓峰, 王艺橦, 江文强, 鞠虹. 高能瞬时电脉冲处理对42CrMo钢组织与性能的影响[J]. 金属学报, 2018, 54(9): 1245-1252. [7] 杨继兰, 蒋元凯, 顾剑锋, 郭正洪, 陈海龑. 奥氏体化温度对中碳淬火-配分钢干滑动摩擦磨损性能的影响[J]. 金属学报, 2018, 54(1): 21-30. [8] 黄龙,邓想涛,刘佳,王昭东. 0.12C-3.0Mn低碳中锰钢中残余奥氏体稳定性与低温韧性的关系[J]. 金属学报, 2017, 53(3): 316-324. [9] 桂晓露,张宝祥,高古辉,赵平,白秉哲,翁宇庆. Q-P-T处理贝氏体/马氏体复相高强钢疲劳断裂特性研究*[J]. 金属学报, 2016, 52(9): 1036-1044. [10] 谢振家,尚成嘉,周文浩,吴彬彬. 低合金多相钢中残余奥氏体对塑性和韧性的影响*[J]. 金属学报, 2016, 52(2): 224-232. [11] 陈连生, 张健杨, 田亚强, 宋进英, 徐勇, 张士宏. 预先Mn配分处理对Q&P钢中C配分及残余奥氏体的影响*[J]. 金属学报, 2015, 51(5): 527-536. [12] 李小琳, 王昭东. 一步Q&P工艺对双马氏体钢微观组织与力学性能的影响*[J]. 金属学报, 2015, 51(5): 537-544. [13] 周文浩, 谢振家, 郭晖, 尚成嘉. 700 MPa级高塑低碳低合金钢的多相组织调控及性能[J]. 金属学报, 2015, 51(4): 407-416. [14] 巨彪, 武会宾, 唐荻, 潘学福. 微观组织演变对超高强耐磨钢板力学性能的影响[J]. 金属学报, 2014, 50(9): 1055-1062. [15] 骆宗安, 刘纪源, 冯莹莹, 彭文. 超快速连续退火对低Si系Nb-Ti微合金化TRIP钢组织和力学性能的影响*[J]. 金属学报, 2014, 50(5): 515-523. Viewed Full text Abstract Cited   Shared      Discussed