Effects of Low Voltage Pulsed Magnetic Field（LVPMF）on Microstructure and Mechanical Properties of Al-12.4Si Alloy

Zhang Lei; Yuan Xiumei; Yao Junping

doi:10.15980/j.tzzz.2013.11.014

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Effects of Low Voltage Pulsed Magnetic Field（LVPMF）on Microstructure and Mechanical Properties of Al-12.4Si Alloy
Vol. 33, Issue 11, Pages: 1074-1077(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.11.014

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[1]张磊,袁秀妹,尧军平.低压脉冲磁场对Al-12.4Si合金组织与力学性能的影响[J].特种铸造及有色合金,2013,33(11):1074-1077.

Zhang Lei, Yuan Xiumei, Yao Junping. Effects of Low Voltage Pulsed Magnetic Field（LVPMF）on Microstructure and Mechanical Properties of Al-12.4Si Alloy. [J]. Special Casting & Nonferrous Alloys 33(11):1074-1077(2013)
[1]张磊,袁秀妹,尧军平.低压脉冲磁场对Al-12.4Si合金组织与力学性能的影响[J].特种铸造及有色合金,2013,33(11):1074-1077. DOI： 10.15980/j.tzzz.2013.11.014.

Zhang Lei, Yuan Xiumei, Yao Junping. Effects of Low Voltage Pulsed Magnetic Field（LVPMF）on Microstructure and Mechanical Properties of Al-12.4Si Alloy. [J]. Special Casting & Nonferrous Alloys 33(11):1074-1077(2013) DOI： 10.15980/j.tzzz.2013.11.014.

摘要

在Al-12.4Si合金的凝固过程中施加低压脉冲磁场处理

研究了低压脉冲磁场对Al-12.4Si合金凝固组织和力学性能的影响。结果表明

在低压脉冲磁场的作用下

Al-12.4Si合金凝固组织中的初生α-Al相和共晶Si相均得到明显细化。随着放电电压的增加

共晶Si相由粗大的长针状转变为细小的纤维状和颗粒状。施加低压脉冲磁场处理后

Al-12.4Si合金的抗拉强度达到了187MPa

伸长率达到了5.2%。相比未施加磁场处理的合金

抗拉强度和伸长率分别提高了41.7%和173.7%。

Abstract

Effects of LVPMF on microstructure and mechanical properties of Al-12.4Si alloy were investigated by introducing a low voltage pulsed magnetic field（LVPMF）during solidification.The results show that the primaryα-Al and eutectic silicon in the Al-12.4Si alloy are refined by LVPMF treatment.With the increase the voltage of LVPMF

eutectic Si phase is transformed from acicular structure into fine fibrous or granular ones.Meanwhile

the tensile strength and elongation of Al-12.4Si alloy under LVPMF at room temperature reach up to 187 MPa and 5.2%

respectively

which are increased by41.7%and by 173.7%

respectively

compared with those of the eutectic Al-Si alloy without LVPMF treatment.