[1]张力宁.铌单晶形变中的应力不对称性[J].东南大学学报(自然科学版),1982,12(3):128-139.[doi:10.3969/j.issn.1001-0505.1982.03.008]
 Chang Li-ning.Stress Asymmetry in the Deformation Behaviour of Niobium Single Crystals[J].Journal of Southeast University (Natural Science Edition),1982,12(3):128-139.[doi:10.3969/j.issn.1001-0505.1982.03.008]
点击复制

铌单晶形变中的应力不对称性()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
12
期数:
1982年第3期
页码:
128-139
栏目:
本刊信息
出版日期:
1982-09-20

文章信息/Info

Title:
Stress Asymmetry in the Deformation Behaviour of Niobium Single Crystals
作者:
张力宁
undefined
Author(s):
Chang Li-ning
关键词:
不对称性 流变应力 体心立方金属 滑移系 滑移面 应力面 室温形变 屈服应力 反向加载 试验温度
分类号:
+
DOI:
10.3969/j.issn.1001-0505.1982.03.008
摘要:
对轴位向在极射投影三角形中部的高纯度铌单晶进行了拉、压以及拉—压交替形变试验,试验温度为77°K——室温。在~200°K以上滑移沿(■01)或最大分切应力面(mrss面)进行;在低温下则主要沿(0■1)面发生反常滑移。在室温试验中未见流变应力不对称性,但随着试验温度的下降,发现压缩形变的抗力比拉伸形变抗力增长得更快,在77°K下压缩流变应力比拉伸流变应力高约l5%。在现有的体心立方金属形变理论基础上,对此结果进行了分析讨论。
Abstract:
Niobium single crystals of high purity with centre triangle orientation have been tested in tension and compression and in alternating tension-compression cycles in the temperature range 77K-room temperature. Slip took place on the (101) plane or on the plane of maximum resolved shear stress (mrss) at temperatures above~200K and on the anomalous (011) plane at low temperatures. There was no detectable flow stress asymmetry for these crystals at room temperature, but deformaton in compression became progressively harder than deformation in tension as the temperature was lowerd and the asymmetry at 77K was about 15% of the actual flow stress. The results are discussed in terms of existing models of the deformation of bee metals.
更新日期/Last Update: 2013-05-01