重熔时间对触变成形Ti@（Al-Si-Ti）<sub>p</sub>/A356复合材料组织和性能的影响

秦贺; 陈体军; 王冲

doi:10.15980/j.tzzz.2017.10.020

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重熔时间对触变成形Ti@（Al-Si-Ti）_p/A356复合材料组织和性能的影响
Effects of Reheating Duration on Microstructure and Tensile Properties of Ti@（Al-Si-Ti）_p/A356 Composites Fabricated by Powder Thixoforming
2017年37卷第10期页码：1112-1116
纸质出版日期： 2017 ，
DOI： 10.15980/j.tzzz.2017.10.020

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[1]秦贺,陈体军,王冲.重熔时间对触变成形Ti@(Al-Si-Ti)_p/A356复合材料组织和性能的影响[J].特种铸造及有色合金,2017,37(10):1112-1116.

Qin He, Chen Tijun, Wang Chong. Effects of Reheating Duration on Microstructure and Tensile Properties of Ti@（Al-Si-Ti）_p/A356 Composites Fabricated by Powder Thixoforming[J]. Special Casting & Nonferrous Alloys, 2017,37(10):1112-1116.
[1]秦贺,陈体军,王冲.重熔时间对触变成形Ti@(Al-Si-Ti)_p/A356复合材料组织和性能的影响[J].特种铸造及有色合金,2017,37(10):1112-1116. DOI： 10.15980/j.tzzz.2017.10.020.

Qin He, Chen Tijun, Wang Chong. Effects of Reheating Duration on Microstructure and Tensile Properties of Ti@（Al-Si-Ti）_p/A356 Composites Fabricated by Powder Thixoforming[J]. Special Casting & Nonferrous Alloys, 2017,37(10):1112-1116. DOI： 10.15980/j.tzzz.2017.10.020.

摘要

研究了部分重熔时间对Ti@（Al-Si-Ti）

/A356复合材料组织和性能的影响。结果表明

随着重熔时间延长

初生相颗粒不断粗化

形状变得不规则

同时生成一种具有厚且致密壳层的Ti@（Al-Si-Ti）芯-壳结构增强体

50 min以后增强体的壳层开始破裂并脱落

同时壳层生成物由τ1相转变为（Al

Si）

Ti相

这些变化导致材料力学性能先升高后降低。当重熔时间为50min时

材料的抗拉强度、屈服强度和伸长率达到最大值

分别为373 MPa、268 MPa和8.3%。

Abstract

Effects of reheating duration on the microstructure and tensile properties of Ti@（Al-Si-Ti）

/A356 composites fabricated by powder thixoforming were investigated.The results indicate that the primaryα-Al particles in the thixoformed Al based composites are coarsened obviously and the shape becomes more and more irregular with increasing in the reheating duration.Simultaneously

an expected core-shell structured Ti@（Al-Si-Ti）particle with a thick and compact shell is formed gradually around each Ti core.Then the shells are cracked and peeled off from the Ti cores with the transformation from τ1 phase into（Al

Si）

Ti phase after 50 min.The results from the tensile testing indicate that the mechanical properties of the composites are increased firstly and then decreased.The tensile strength

yield strength and elongation of the composites reach 373 MPa

268 MPa and 8.3%

respectively

with reheating duration time of 50 min.