Effects of Al-Ti-C Master Alloy on Microstructure and Mechanical Properties of Mg-8Li-3Al Alloy

Li Ming; Hao Hai; Zhang Aimin; Song Yingde; Zhang Xingguo

doi:10.15980/j.tzzz.2013.01.018

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Effects of Al-Ti-C Master Alloy on Microstructure and Mechanical Properties of Mg-8Li-3Al Alloy
Vol. 33, Issue 1, Pages: 81-84(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.01.018

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[1]李明,郝海,张爱民,宋迎德,张兴国.Al-Ti-C中间合金对Mg-8Li-3Al合金组织和性能的影响[J].特种铸造及有色合金,2013,33(01):81-84.

Li Ming, Hao Hai, Zhang Aimin, et al. Effects of Al-Ti-C Master Alloy on Microstructure and Mechanical Properties of Mg-8Li-3Al Alloy. [J]. Special Casting & Nonferrous Alloys 33(1):81-84(2013)
[1]李明,郝海,张爱民,宋迎德,张兴国.Al-Ti-C中间合金对Mg-8Li-3Al合金组织和性能的影响[J].特种铸造及有色合金,2013,33(01):81-84. DOI： 10.15980/j.tzzz.2013.01.018.

Li Ming, Hao Hai, Zhang Aimin, et al. Effects of Al-Ti-C Master Alloy on Microstructure and Mechanical Properties of Mg-8Li-3Al Alloy. [J]. Special Casting & Nonferrous Alloys 33(1):81-84(2013) DOI： 10.15980/j.tzzz.2013.01.018.

摘要

通过液固反应制备了含TiC和Al4C3相的Al-Ti-C中间合金

并利用OM、XRD、SEM和EDS等研究了Al-Ti-C中间合金对Mg-8Li-3Al合金显微组织和力学性能的影响。结果表明

Al-Ti-C中间合金的最佳加入量为1.0%;加入量为1.0%时

粗大的α相树枝晶变成颗粒状

并且α相变得更加细小圆整

合金的抗拉强度和伸长率分别达到199.28MPa和14.60%。

Abstract

The Al-Ti-C master alloy containing TiC and Al4C3 was prepared by a liquid-solid reaction. The effects of the Al-Ti-C master alloy additions on the microstructure and mechanical properties of Mg-8Li-3Al alloy were investigated by means of OM （optical microscopy）

XRD（X-ray diffraction）

SEM（scanning electron microscopy） and EDS （energy dispersive spectrometer）. The results show that the optimal addition of Al-Ti-C master alloy into Mg-8Li-3Al alloy is 1.0%. The morphology of large α-phases dendrites is changed into particles

and the sizes of α-phases are reduced with spheroidization. Meanwhile

the tensile strength and the elongation of Mg-8Li-3Al alloy reach 199.28 MPa and 14.60%

respectively.