金属学报  2011, Vol. 47 Issue (3): 321-326    DOI: 10.3724/SP.J.1037.2010.00583

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利用纳米压入的反演分析法确定金属材料的塑性性能

马永1,姚晓红1,田林海1,张翔宇1,树学峰2,唐宾1

1.太原理工大学表面工程研究所, 太原 030024 2.太原理工大学应用力学与生物医药工程研究所, 太原 030024

EXTRACT THE PLASTIC PROPERTIES OF METALS USING REVERSE ANALYSIS OF NANOINDENTATION TEST

MA Yong 1, YAO Xiaohong 1, TIAN Linhai 1, ZHANG Xiangyu 1, SHU Xuefeng 2, TANG Bin 1

1. Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024 2. Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024

马永 姚晓红 田林海 张翔宇 树学峰 唐宾. 利用纳米压入的反演分析法确定金属材料的塑性性能[J]. 金属学报, 2011, 47(3): 321-326.
, , , , , . EXTRACT THE PLASTIC PROPERTIES OF METALS USING REVERSE ANALYSIS OF NANOINDENTATION TEST[J]. Acta Metall Sin, 2011, 47(3): 321-326.

摘要 参考文献 相关文章 Metrics 全文: PDF(1653 KB)   摘要: 建立了一种确定金属材料塑性性能的方法, 即利用有限元数值模拟对纳米压入过程进行反演分析, 确定金属材料的屈服极限和应变强化指数.首先在不考虑材料加工硬化的情况下, 对纳米压入过程进行反演修正模拟,当模拟曲线同正向分析曲线相吻合时, 确定金属材料的代表性应力;其次在考虑不同应变强化指数的情况下, 采用相同的方法确定金属材料的代表性应变; 最后结合量纲分析确定金属材料的应变强化指数,继而确定金属材料的屈服极限. 经过实验验证, 该方法具有较高的精度. 关键词 ： 正向分析,  反演分析,  代表性应力,  代表性应变,  应变强化指数     Abstract：Using traditional methods to evaluate mechanical properties of bulk materials is not applicable for metal surface studying and metals with very small volume. Nanoindentation testing at very low load is a new successful technique for study of mechanical properties on small scales or near surfaces. However, so far there is not a robust approach to determine plastic properties of metal materials using nanoindentation test. The aim of this paper is to present a method for determining the plastic properties, e.g. the true plastic stress–true plastic strain relation of metals combining nanonindentation test and finite element simulation. This methodology contains three main parts. Firstly, considering the special case of metals without strain hardening, the representative stress εr is determined by varying assumed representative stress over a wide range until the reverse and forward loading curves are consistent. Then, also by comparing the reverse and forward loading curves, the representative strain "r is obtained, but with different values of strain hardening exponent n, which are in the range of 0—0.6. Secondly, a series of simulations are performed for 124 combinations of each parameter (E, σy, n, ν) expressing the elastic–plastic behaviors of the universal engineering metals. Fom the computational results, a dimensinless function ∏u is constructed, and then the strain hardening exponent idetermined. At last, substituting the strain hardening exponent n into the power law constitution, the yield stress σy of metals is acquired. The examination of 5 kinds of metals from the forward analysis metal materials indicates that the dimensionless function ∏u has generality and the strain hardening exponent has stability and uniqueness. The accuracy of this method is also examined by comparing the elasto–plastic properties of practical metal AISI 304 steel obtained from nanoindentation test and finite element simulation with the tensile test results. In order to make the reverse analysis results get higher precision, in the practical applcation of this technique, the test error of nanoindentation should be maximally reduced. Key words： forward analysisreverse analysis    representative stress    representative strain    strain hardening xonen 收稿日期: 2010-11-03      ZTFLH:  TG115.5   基金资助: 国家高技术研究发展计划项目2007AA03Z521, 国家自然科学基金项目50771070和山西省科技攻关项目20100321078-02资助 作者简介: 马永, 男, 1980年生, 博士生 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 马永 姚晓红 张翔宇 田林海 树学峰 唐宾 44.8K 链接本文: https://www.ams.org.cn/CN/10.3724/SP.J.1037.2010.00583      或      https://www.ams.org.cn/CN/Y2011/V47/I3/321 [1] Oliver W C, Pharr G M. J Mater Res, 1992; 7: 1564 [2] Pharr G M. Mater Sci Eng, 1998; A253: 151 [3] Dao M, Chollacoop N, Van Vliet K J, Venkatesh T A, Sure S. Acta Mater, 2001; 49: 3899 [4] Bucaille J L, Stauss S, Felder E, Michler J. Acta Mater, 2003; 51: 1663 [5] Chollacoop N, Dao M, Suresh S. Acta Mater, 2003; 51: 3713 [6] Antunes J M, Fernandes J V, Menezes L F, Chaparro B M. Acta Mater, 2007; 55: 69 [7] Lee J, Lee C, Kim B. Mater Des, 2009; 30: 3395 [8] Cao Y P, Lu J. Acta Mater, 2004; 52: 4023 [9] Lee J H, Kim T, Lee H. Int J Solids Struct, 2010; 47: 647 [10] Chollacoop N, Ramamurty U. Scr Mater, 2005; 53: 247 [11] Cao Y P, Qian X Q, Huber N. Mater Sci Eng, 2007; A454–455: 1 [12] Kim J Y, Lee K W, Lee J S, Kwon D. Surf Coat Technol, 2006; 201: 4278 [13] Branch N A, Subhash G, Arakere N K, Klecka M A. Acta Mater, 2010; 58: 6487 [14] Tabor D. The Hardness of Metals. London: Oxford University Press, 1951: 120 [15] Choi Y, Lee H S, Kwon D. J Mater Res, 2004; 19: 3307 [16] Soare S, Bull S J, O’Neil A G,Wright N, Horsfall A, Santos J M M dos. Surf Coat Technol, 2004; 177–188: 497 [1] 秦飞, 项敏, 武伟. 纳米压痕法确定TSV-Cu的应力-应变关系*[J]. 金属学报, 2014, 50(6): 722-726. [2] 田妮 赵刚 左良 刘春明 . 汽车车身用Al-Mg-Si-Cu合金薄板应变强化行为的研究[J]. 金属学报, 2010, 46(5): 613-617. Viewed Full text Abstract Cited   Shared      Discussed