DETERMINATION OF THE ELASTIC MODULUS ON Ni-Ti ALLOYS
摘 要
采用静态拉伸法和纳米压入法对具有伪弹性行为的镍-钛合金的弹性模量进行了研究。结果表明,镍-钛合金的弹性模量随其相组成的变化而变化,母相状态时的弹性模量为24.5 GPa,而马氏体相状态时的弹性模量为11.6 GPa。多次重复拉伸使其弹性模量降低并呈现非线性的变化趋势。纳米压入法测量镍-钛合金的弹性模量同拉伸法测量结果有较大的偏差,其原因同纳米压入法未考虑伪弹性变形行为有关。
Abstract
The elastic modulus of Ni-Ti alloys,which are with the pseudo elasticity,has been investigated by means of static tension method and nano-indentation method. The results showed that elastic modulus varied with the phase constitution of the alloy,with the elastic modulus of the matrix phase to be 24.5 GPa and the martensite phase to be 11.6 GPa. Multiple tensions lowed down the elastic modulus of the alloy and exhibited a non-linear relationship with strain. The elastic modulus determined by nano-indentation was different with that by the static tension,which is due to the ignorance of the pseudo elastic deformation in the nano-indentation.
中图分类号 O313 TB302
所属栏目 试验与研究
基金项目 国家自然科学基金资助项目(50571017)
收稿日期 2007/4/23
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备注张 蓓(1968-),女,工程师。
引用该论文: ZHANG Bei,ZHAO Xue-dan,WU Ping,WANG Jian-guo,SONG Xi-ping. DETERMINATION OF THE ELASTIC MODULUS ON Ni-Ti ALLOYS[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2007, 43(9): 437~438
张 蓓,赵雪丹,吴 平,王建国,宋西平. 镍-钛合金弹性模量的测定[J]. 理化检验-物理分册, 2007, 43(9): 437~438
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参考文献
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【2】《工程材料实用手册》编辑委员会.工程材料实用手册[M].北京:中国标准出版社,2002.
【3】Oliver W C,Pharr G M,Pharr G M. An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments[J] . J Mater Res,1992,7(6):1564-1583.
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