超声处理对Mg-9Al-3Si合金组织及力学性能的影响

付浩; 吴红燕; 曹炳鑫; 徐超; 周全; 张连腾

doi:10.15980/j.tzzz.2021.01.015

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超声处理对Mg-9Al-3Si合金组织及力学性能的影响
Influence of Ultrasonic Treatment on Solidification Structure and Mechanical Properties of Mg-9Al-3Si Alloy
2021年41卷第1期页码：73-77
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.01.015

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[1]付浩,吴红燕,曹炳鑫,徐超,周全,张连腾.超声处理对Mg-9Al-3Si合金组织及力学性能的影响[J].特种铸造及有色合金,2021,41(01):73-77.

Fu Hao, Wu Hongyan, Cao Bingxin, et al. Influence of Ultrasonic Treatment on Solidification Structure and Mechanical Properties of Mg-9Al-3Si Alloy[J]. Special Casting & Nonferrous Alloys, 2021,41(1):73-77.
[1]付浩,吴红燕,曹炳鑫,徐超,周全,张连腾.超声处理对Mg-9Al-3Si合金组织及力学性能的影响[J].特种铸造及有色合金,2021,41(01):73-77. DOI： 10.15980/j.tzzz.2021.01.015.

Fu Hao, Wu Hongyan, Cao Bingxin, et al. Influence of Ultrasonic Treatment on Solidification Structure and Mechanical Properties of Mg-9Al-3Si Alloy[J]. Special Casting & Nonferrous Alloys, 2021,41(1):73-77. DOI： 10.15980/j.tzzz.2021.01.015.

摘要

研究了超声处理对Mg-9Al-3Si合金凝固组织及力学性能的影响。结果表明

通过控制超声工艺参数可改善Mg-9Al-3Si合金凝固组织

提高其力学性能的目的。在超声功率为0～900W时

随着超声功率增大

合金中的Mg

Si相逐渐细化

其抗拉强度先增后减

转折点为700W。在超声处理时间为0～90s时

随着超声处理时间延长

合金中的Mg

Si相逐渐细化

其抗拉强度先增后减

转折点为60s。分析其断口发现

未经超声处理的合金断裂形式为解理断裂

经过超声处理的合金断口解理台阶尺寸减小

呈准解理断裂特征。

Abstract

The effects of ultrasonic power and treatment time on the solidification structure and mechanical properties of Mg-9Al-3Si alloy were investigated.The results reveal that refinement of the structure and improvement of the mechanical properties of the alloy can be achieved by controlling the ultrasonic parameters.In the range of 0～900 W

with the increase of ultrasonic power

the Mg

Si phase in the alloy is gradually refined

and its tensile strength is increased firstly and then decreased

where the turning point is 700 W.In the range of 0～90 s

with the increase of ultrasonic treatment time

the Mg

Si phase in the alloy is gradually refined

and its tensile strength is increased firstly and then decreased

and the turning point is 60 s.The fracture morphology of Mg-9Al-3Si alloy without ultrasonic treatment presents cleavage fracture

while the size of cleavage step of Mg-9Al-3Si alloy is decreased after ultrasonic treatment

characterized by quasi-cleavaye fracture.