High strain rate superplasticity of SiC whisker reinforced pure aluminum composites

来源期刊：中国有色金属学报(英文版)1999年第3期

论文作者：许晓静 赵昌正 张荻 施忠良 吴人洁

文章页码：500 - 504

Key words：high strain rate; superplasticity; aluminum matrix composites; pressure infiltration

Abstract: A β-SiC whisker reinforced pure aluminum composites expected to exhibit high strain rate superplasticity has been successfully fabricated by a new processing route consisting of pressure infiltration, extrusion with a low extrusion ratio and rolling. The composites exhibite a total elongation of 220%~380% in the initial strain rates within 1.0×10^-2~1.0×10^-1s^-1 and at 893~903 K. According to differential thermal analysis(DTA) and microstructure observation, it is concluded that an appropriately small amount of liquid phase is necessary to cause a good high strain rate superplasticity in aluminum matrix composites in addition to fine and uniform microstructure.