Aluminum matrix composite reinforced by in-situ formed intermetallic Al₃Ti

来源期刊：中国有色金属学报(英文版)2002年第4期

论文作者：赵玉厚 周敬恩 严文

文章页码：643 - 648

Key words：in-situ composite; microstructure; mechanical properties; reinforcement mechanism

Abstract: The reinforced phase of in-situ formed intermetallic compound Al₃Ti with grain size about 0.5μm in the aluminum matrix composite was achieved by the method of liquid-solid reaction under specific condition. The orientations were al so studied. The results show that under T6 heat treatment regime, the tensile strength, hardness, elastic modulus and elongation of Al₃Ti/ZL101 in-situ composite are increased by 32.8%, 14.4%, 19.2% and 14.6% respectively in comparison with those of ZL101. Al₃Ti is uniformly distributed in α(Al) matrix with a clear phase interface, and the orientation relationship between Al₃Ti and α(Al) is (006)_Al3Ti∥(0-22)_Al，［1-22］_Al3Ti［11-0］_Al. The strengthening mechanisms of Al₃Ti/ZL101 in-situ compo site is proved to be caused by fine grain size, spreading distribution and dislocation multiplication.