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纳米压痕法测量锌铝钎料的室温蠕变应力指数
引用本文:姬峰,薛松柏,刘霜,娄继源,娄银斌.纳米压痕法测量锌铝钎料的室温蠕变应力指数[J].焊接学报,2013,34(2):75-78.
作者姓名:姬峰  薛松柏  刘霜  娄继源  娄银斌
作者单位:1. 南京航空航天大学材料科学与技术学院,南京,210016
2. 浙江新锐焊接材料有限公司,嵊州,312452
基金项目:南京航空航天大学大学生创新训练计划资助项目
摘    要:利用纳米压痕技术,采用恒加载速率法,研究了Zn-22Al和Zn-22Al-0.03Ti钎料的室温蠕变行为,并对相关数据进行了测量和计算.结果表明,室温时任一载荷条件下保载时,钎料均发生了明显的蠕变行为.其中Zn-22Al-0.03Ti钎料的压入深度和蠕变位移均小于Zn-22Al钎料,最大差值分别为15.68%和26.87%.相同保载时间不同载荷保载时,两种钎料的蠕变位移均有较大差异.通过拟合计算分别获得了两种钎料室温时的蠕变应力指数,Zn-22Al-0.03Ti较Zn-22Al提高了35.79%.分析认为,Ti元素的添加导致了Zn-22Al钎料晶粒的细化,从而产生了更多的晶界是导致钎料室温抗蠕变能力提高的主要原因.

关 键 词:纳米压痕  锌铝钎料  蠕变变形  应力指数
收稿时间:2012/7/10 0:00:00

Measurement of creep stress exponent of Zn-Al filler metal at room temperature by using nanoindentation
JI Feng,XUE Songbai,LIU Shuang,LOU Jiyuan and LOU Yinbin.Measurement of creep stress exponent of Zn-Al filler metal at room temperature by using nanoindentation[J].Transactions of The China Welding Institution,2013,34(2):75-78.
Authors:JI Feng  XUE Songbai  LIU Shuang  LOU Jiyuan and LOU Yinbin
Affiliation:College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,Zhejiang Xinrui Welding Material Co., Ltd, Shaoxing 312400, China and Zhejiang Xinrui Welding Material Co., Ltd, Shaoxing 312400, China
Abstract:The creep behavior of Zn-22Al and Zn-22Al-0.03Ti filler metals at room temperature were studied by nanoindentation in this paper,and constant loading rate method was used to calculate the creep stress exponent. The results indicate that,both the Zn-22Al and Zn-22Al-0.03Ti produced obvious creep deformation under holding load. Both the depth and creep displacement of Zn-22Al-0.03Ti were less than that of Zn-22Al, and the maximum difference were 15.68% and 26.87%,respectively. Under the constant time,the filler metals produced different creep displacement with different loadings. The creep stress exponents of two filler metals at room temperature were obtained by fitting method. Zn-22Al-0.03Ti had a higher creep stress exponent than Zn-22Al filler metal,which implied that Tibearing filler metals had better creep resistance than Zn-22Al alloy. The grain of Zn-22Al filler metal could be refined remarkably with the Ti addition,which might result in the increase of grain boundary and finally enhanced the creep resistance of alloy.
Keywords:nanoindentation  Zn-Al filler metal  creep  creep stress exponent
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