金属学报  1988, Vol. 24 Issue (4): 221-227

论文 本期目录 | 过刊浏览 |

不锈钢在循环形变中的Bauschinger效应及其位错结构

夏月波;王中光;杜秀魁

副研究员;沈阳中国科学院金属研究所;中国科学院金属研究所;中国科学院金属研究所

BAUSCHINGER EFFECT AND DISLOCATION STRUCTURE IN STAINLESS STEEL DURING CYCLIC DEFORMATION

XIA Yuebo;WANG Zhongguang;DU Xiukui Institute of Metal Research; Academia Sinica; Shenyang

夏月波;王中光;杜秀魁. 不锈钢在循环形变中的Bauschinger效应及其位错结构[J]. 金属学报, 1988, 24(4): 221-227.
, , . BAUSCHINGER EFFECT AND DISLOCATION STRUCTURE IN STAINLESS STEEL DURING CYCLIC DEFORMATION[J]. Acta Metall Sin, 1988, 24(4): 221-227.

摘要 参考文献 相关文章 Metrics 全文: PDF(2197 KB)   摘要: 两种处理的Cr-Mn-N不锈钢在室温下进行了对称的拉压循环形变试验,所使用的应变范围从0.008到0.024,测量了不同循环周次后的拉半周和压半周的屈服应力σ_(0.2f)和σ_(0.2r),峰值应力σ,并记录了应力-应变滞后回线。从σ_(0.2f)和σ_(0.2r)计算出不同循环周次后的Bauschinger效应强度差别因子(BSDF),从滞后回线计算出各种周次的能量损耗△E。结果指出,两种制度处理的试样在不同的循环应变幅下,三个参量σ,△E和BSDF都表现出明显不同的两个阶段. 在应变范围0.012下经受不同循环周次的试样做了透射电镜观察,表明位错主要堆积在晶界,并存在大量的形变孪晶.合金中的氮含量有效地降低了合金的层错能,位错的交滑移和攀移受到一定程度的抑制,因而循环形变的稳态位错结构,即位错胞和驻留滑移带中的位错墙,只有在接近寿命或断裂后的试样中才能观察到. 关键词 ： Bauschinger效应,  循环形变,  位错结构     Abstract：Cyclical deformation in symmetrical push-pull mode was carriedout on a Cr-Mn-N stainless steel at room temperature in air using a Schenck Hy-dropuls machine. The total strain amplitude which was kept constant during thetest ranges from ±0.004 to ±0.012. The 0.2% offset yield stress σ_(0.2f) in tensile andσ_(0.2r) in compressive and peak stress were measured after various cycles. The Bausch-inger strength differential factor(BSDF) was then calculated from σ_(0.2f) and σ_(0.2r). TheΔE was also calculated from hysteresis loop areas for various cycles. These parame-ters, BSDF, σ and ΔE appear to have two distinctively different stages. The dislocation structures were observed using TEM in specimens deformed cy-clically for various cycles. The observation shows that the dislocations pile-up main-ly at grain boundaries and there exists large amount of deformation twins. Thenitrogen content of 0.25 wt-% places the alloy in the low stacking fault energyregime. Cross-slip and climb are thereform rather difficult to occur during the cy-clic deformation at room temperature, and well-defined dislocation cells and wallscan only be seen at the final stage of fatigue. Key words： Bauschinger effect    cyclic deformation    dislocation structure 收稿日期: 1988-04-18      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 夏月波 王中光 杜秀魁 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1988/V24/I4/221 1 Bauschinger J. Min Proc Inst Civil Eng, London, 1886; 87: 463 2 Mataya M C, Carr M J. Mater Sci Eng, 1983; 57: 205 3 Stoltz R E, Pclloux R M. Metall Trans, 1976; 7A: 1295 4 Saleh Y, Margolin H. Acta Metall, 1979; 27: 535 5 Abel A, Ham R K. Acta Metall, 1966; 14: 755 6 Hull D. Introduction to Dislocation, Oxford: Pergamon Press, 1968: 136 7 Daniels R C, Horn G T. Metall Trans, 1971; 2: 1161 8 Griffiths D, Riley J N. Acta Metall, 1966; 14: 755 9 Fisher J C, Hart E W, Pry R H. Acta Metall, 1953; 1: 336 10 Sowerby R, Uko D K, Tomita Y. Mater Sci Eng, 1979; 41: 43 11 Li C C, Flaseh J O, Yaker J A, Leslie W C. Metall Trans, 1978; 9A: 85 12 Hasegawa J, Yakou T, Shimizn M, Karashima S. Trans Jpn Inst Met, 1976; 17: 414 13 Odegard B C, West A J, Brooks J A. In: Thompson A W, Bernstein I M eds., Effect of Hydrogen on Behaviour of Materials, New York: AIME, 1976: 189 14 Stoltz R E, Vander Sande J B. Metall Trans, 1980; 11A: 1033 15 Thompson A W. Metall Trans, 1977; 8A: 833 16 Mughrabi H. Acta Metall, 1983; 31: 1367 17 Embury J D. Strengthening Methods in Crystals, London: Applied Science, 1971: 348 [1] 韩冬, 张炎杰, 李小武. 短程有序对高层错能Cu-Mn合金拉-拉疲劳变形行为及损伤机制的影响[J]. 金属学报, 2022, 58(9): 1208-1220. [2] 郭巍巍,齐成军,李小武. 共轭和临界双滑移取向Cu单晶体疲劳位错结构的热稳定性研究*[J]. 金属学报, 2016, 52(6): 761-768. [3] 李晓雁. 纳米晶Al薄膜Bauschinger效应的分子动力学模拟*[J]. 金属学报, 2014, 50(2): 219-225. [4] 颜莹,卢蒙,李小武. 预疲劳变形对粗晶纯Al单向拉伸行为的影响[J]. 金属学报, 2013, 49(6): 658-666. [5] 郭巍巍,齐成军,李小武. 一个共面双滑移取向Cu单晶体疲劳位错结构的热稳定性研究[J]. 金属学报, 2013, 49(1): 107-114. [6] 陈畅 汪明朴 王珊 贾延琳 左波 夏福中. Ta-7.5%W合金箔材冷轧过程中的位错结构演变[J]. 金属学报, 2011, 47(8): 984-989. [7] 杨军 贺志荣 王芳 王永善. Cr掺杂对Ti-Ni形状记忆合金相变和循环形变特性的影响[J]. 金属学报, 2011, 47(2): 157-162. [8] 李小武 曹昕明 马超群. 含富Cr沉淀颗粒Fe--Cr合金单晶体的疲劳变形特征[J]. 金属学报, 2009, 45(7): 801-807. [9] 耿小亮; 张克实; 郭运强; 秦亮 . 细观非均质性对多晶材料塑性行为的影响[J]. 金属学报, 2006, 42(1): 49-53 . [10] 陈常强; 李守新; 李广义; 艾素华 . 低氢含量工业纯钛循环变形的微观结构 I．[J]. 金属学报, 2004, 40(3): 235-240 . [11] 陈常强; 李守新; 李广义; 艾素华 . 低氢含量工业纯钛循环变形的微观结构II.[J]. 金属学报, 2004, 40(3): 241-244 . [12] 黄崇湘; 吴世丁; 李广义; 刘腾; 姜传斌; 李守新 . 循环形变对超细晶铜室温拉伸行为的影响[J]. 金属学报, 2004, 40(11): 1165-1169 . [13] 张文征 . O点阵模型及其在界面位错计算中的应用[J]. 金属学报, 2002, 38(8): 785-794 . [14] 肖林; 白菊丽 . Zr-4合金双轴疲劳行为及其微观变形机理Ⅱ.双轴循环变形亚结构及其？…[J]. 金属学报, 2000, 36(9): 919-925 . [15] 吴世丁; 王中光; 李广义 . 亚微米铜循环形变特征研究[J]. 金属学报, 1999, 35(9): 960-963 . Viewed Full text Abstract Cited   Shared      Discussed