| 查看: 414 | 回复: 0 | ||
[求助]
文献翻译急求！！
|
|
it has suggested that the sliding wear of metals commonly includes the following sequence of events: large plastic strains resulting from asperity contacts, generation of a heterogeneous substructure consistent with large strains, shear instability leading to transfer of material from one sliding component to the other, mechanical mixing which produces an ultra-fine grain size material on the surface, and removal of this mechanically mixed material as wear debris particles. The phenomena were successfully explained on an immobilized action by cross-slip and thermal activated process of superdislocations in L1 2 crystalline structures of the Ni3Al-type alloys. It has been suggested that the high hardening rate in the ordered crystals may be due to the generation of antiphase domain boundary(APB) tubes formed by cross-slip pinning. The APB and/or stacking fault energy of different lattice plans in ordered structures change with temperature. When the difference is lower following raised temperature, the cross-slipping of the screw dislocations occurs more easily and finally results in high strain hardenability. In fact, the selected NAC-alloy has constant yield strength of not less than 600 MPa up to 600 ◦C, and over 5% room temperature tensile elongation. The alloy has also a higher work-hardening [31], which means that a deformation induced hard layer at the worn surface can be formed quickly, and the hardness of the layer even further raised by an increased surface temperature from friction. |
回复此楼» 猜你喜欢
博士自荐
已经有6人回复
-
博士推荐
已经有4人回复
-
求环氧树脂研发1名
已经有10人回复
-
280求调剂
已经有5人回复
-
什么是人一生最重要的？
已经有10人回复
-
面上可以超过30页吧？
已经有13人回复
-
为什么中国大学工科教授们水了那么多所谓的顶会顶刊，但还是做不出宇树机器人？
已经有13人回复
-
版面费该交吗
已经有17人回复
-
【博士招生】太原理工大学2026化工博士
已经有8人回复