压力浸渗SiCW/LY12复合材料的超塑性

Superplasticity of SiCw/LY12 Composite Made by Pressure Infiltration

对压力浸渗、小挤压比挤压以及进一步轧制制备的β－ＳｉＣ晶须增强ＬＹ１２铝基复合材料的超塑性变形行为进行了研究。研究表明：该复合材料在温度为７８８～８０８Ｋ、初始应变速率为３．３×１０－３～３．３×１０－２ｓ－１的条件下超塑性变形时，延伸率为２００％～３７０％。

The superplastic characteristics of the betaSiC whisker reinforced LY12 aluminum composite, fabricated by pressure infiltration and hotrolling after extrusion with a low extrusion ratio, were investigated The results show that the SiCw/LY12 composite exhibit a total elongation of 200%370% in the initial strain rate region from 33103 to 33102 s1at 788808K