论文部分内容阅读
一、引言文献中关于金属在范性形变过程中内耗的主要研究结果可以总结为如下两个方面:1.范性形变过程中的大内耗Q_p~(-1)是范性形变的结果.范性形变一旦停止,即使保持载荷不变,内耗也立即下降到约为形变前的背景值;而当再次进行范性形变时,内耗立即恢复到中止形变前的值.所以它是一种运动位错引起的内耗.2.范性形变过程中内耗Q_P~(-1)正比于范性形变速率εp,并因而正比于位错运动的平均速度(?)~([3]),所以Q_p~(-1)必然与位错平均运动速度(?)有关.
I. INTRODUCTION The main research results about the internal friction of metal in the process of normal deformation can be summarized in the following two aspects: 1. The large internal friction Q_p ~ (-1) in the process of normal deformation is the result of the normal deformation Once the deformation is stopped, the internal friction immediately drops to about the background value before deformation, even if the load is kept unchanged. When the normal deformation is performed again, the internal friction immediately returns to the value before the suspension, so it is a kind of exercise position The internal friction caused by fault.2.The internal friction Q_P ~ (-1) in the process of normal deformation is proportional to the normal deformation rate εp and is therefore proportional to the average velocity of dislocation movement (?) ~ ([3]), so Qp ~ (-1) must be related to the average dislocation velocity (?).