祝庆勋
,
徐勇
,
张士宏
,
张贵杰
,
宋鸿武
材料科学与工艺
通过XRD衍射及不同方向单向拉伸试验验证,经过多道次拉拔生产出的304奥氏体不锈钢管材存在有明显的各向异性现象.采用Mises各向同性、Hill1948和Barlat1991各向异性屈服准则对不锈钢弯管过程进行有限元模拟,分析弯曲后管材内外侧壁厚分布、弯曲角度及管坯截面椭圆度的变化规律,通过模拟与实...
关键词:
奥氏体不锈钢
,
管材弯曲
,
屈服准则
,
各向异性
Jing HAN
,
Hongtao CHEN
,
Mingyu LI
金属学报(英文版)
A small Pb-free solder joint exhibits an extremely strong anisotropy due to the body-centered tetragonal (BCT) lattice structure of β-Sn. Grain orientations can significantly influence the failure mode of Pb-free solder joints under thermomechanical fatigue (TMF) due to the coefficient...
关键词:
Pb-free solder
,
null
,
null
,
null
,
null
张宝芹
,
于名讯
,
张伟
,
黄成亮
,
李永波
宇航材料工艺
介绍了各向异性吸波材料高频磁性能,对近年来研究较多的薄膜、纤维、片状磁性吸波材料及其研究进展进行了总结,并分析了在工程化应用中存在的问题,最后,对其发展趋势和方向进行了展望.
关键词:
各向异性
,
电磁性能
,
吸波材料
Yanxue CHEN
,
Shouguo WANG
,
Liangmo MEI
,
Kungwon Rhie
,
Sangjin Byeun
材料科学技术(英文)
A series of CoFe (4 nm)/ Cu(X nm) Al (Y nm)/ CoFe(6 nm) samples have been prepared at room temperature. An exponential decay of the GMR (Giant Magnetoresistance) with Y was observed for fixed X=2nm. The characteristic decay parameter of Al is obtained to be about 0.26nm, which is rather close to 1 m...
关键词:
CoFe
,
null
,
null