Microstructure of Al<sub>2</sub>Sm/AZ61 Magnesium Alloy Prepared by In-situ Reaction under Ultrasonic Treatment

Hua Qun; Hu Zhi; Jie Xiaoping; Yan Hong

doi:10.15980/j.tzzz.2014.03.032

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Microstructure of Al₂Sm/AZ61 Magnesium Alloy Prepared by In-situ Reaction under Ultrasonic Treatment
Vol. 34, Issue 3, Pages: 329-332(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.03.032

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[1]华群,胡志,揭小平,闫洪.超声原位制备Al_2Sm/AZ61镁合金的显微组织[J].特种铸造及有色合金,2014,34(03):329-332.

Hua Qun, Hu Zhi, Jie Xiaoping, et al. Microstructure of Al₂Sm/AZ61 Magnesium Alloy Prepared by In-situ Reaction under Ultrasonic Treatment. [J]. Special Casting & Nonferrous Alloys 34(3):329-332(2014)
[1]华群,胡志,揭小平,闫洪.超声原位制备Al_2Sm/AZ61镁合金的显微组织[J].特种铸造及有色合金,2014,34(03):329-332. DOI： 10.15980/j.tzzz.2014.03.032.

Hua Qun, Hu Zhi, Jie Xiaoping, et al. Microstructure of Al₂Sm/AZ61 Magnesium Alloy Prepared by In-situ Reaction under Ultrasonic Treatment. [J]. Special Casting & Nonferrous Alloys 34(3):329-332(2014) DOI： 10.15980/j.tzzz.2014.03.032.

摘要

用超声原位反应技术合成Al2Sm颗粒增强镁合金

采用光学显微镜、扫描电镜和X射线衍射仪分析了AZ61-2Sm镁合金的组织形貌和相组成。结果表明

AZ61-2Sm镁合金在600 W超声波下作用2min

原位生成的Al2Sm增强相更加细小

团聚现象得到改善

增强相尺寸从约13μm减小到6μm左右。超声作用瞬时产生的高温、高压使得AZ61-2Sm合金中不连续网状的Mg17Al12相熔断、团聚状的Al2Sm相击碎成细小颗粒状;细小的Al2Sm颗粒在声流效应作用下宏观均匀分散于整个熔体中。

Abstract

The Al2 Sm/AZ61 magnesium alloys were prepared by ultrasonic in-situ reaction.And the microstructure and phase constituent of the alloys were investigated by means of optical microscopy（OM）

scanning electron microscopy（SEM）and X-ray diffraction（XRD）.The results indicate that with the ultrasonic power of 600 W for 2min

the Al2 Sm reinforcing phases size is reduced from 13μm to 6μm

and the agglomeration phenomenon is relieved.Discontinuous net-like Mg17 Al12 phase in AZ61-2Sm alloys is melted

meanwhile

the morphology of Al2 Sm phase exhibits the change from agglomerate state into small granular shape as a result of transient high temperature and high pressure from acoustic cavitation.Al2Sm particles are uniformly dispersed in the melt as a result of the acoustic streaming effect.