Effect of Al-Ti Master Alloy on the Grain Refinement and Hot Tearing of AZ91 Mg Alloys

被引：7

作者：

Davis, T. A. ^{[1
]}

Bichler, L. ^{[1
]}

机构：

[1] Univ British Columbia Okanagan, Sch Engn, 3333 Univ Way, Kelowna, BC V1V 1V7, Canada

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2023年 / 32卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

advanced characterization; hot tearing; grain refinement; magnesium; titanium; MAGNESIUM ALLOY; SUSCEPTIBILITY; ALUMINUM;

D O I：

10.1007/s11665-022-06898-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The AZ91D magnesium (Mg) alloy is a widely used aluminum (Al)-bearing commercial alloy. However, due to the presence of low-melting temperature phases, the alloy remains highly susceptible to hot tearing. In many Al and Mg alloys, grain refinement was seen to reduce the hot tearing severity, but an effective refiner for Al-bearing Mg alloys has been elusive. In the present work, a novel titanium (Ti)-based master alloy was developed using a spark plasma sintering (SPS) powder metallurgy route. Its effect on hot tearing was quantitatively studied in-situ using a mold with a load cell. In addition to a significant grain refinement, the master alloy eliminated hot tearing in casting conditions where untreated AZ91D Mg alloy readily nucleated hot tears.

引用

页码：2577 / 2586

页数：10

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