Effects of Ti Content on As-cast Microstructure of Al-Mn Alloy

Yang Yongjun; Zhang Jinshan; Zhang Yongqing; Zhao Gaozhan; Liang Wei

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Effects of Ti Content on As-cast Microstructure of Al-Mn Alloy
Vol. 30, Issue 9, Pages: 867-870(2010)
Published： 2010 ，
DOI：

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[1]杨永军,张金山,张永青,赵高瞻,梁伟.Ti含量对Al-Mn合金铸态组织的影响[J].特种铸造及有色合金,2010,30(09):867-870+783.

Yang Yongjun, Zhang Jinshan, Zhang Yongqing, et al. Effects of Ti Content on As-cast Microstructure of Al-Mn Alloy. [J]. Special Casting & Nonferrous Alloys 30(9):867-870(2010)
[1]杨永军,张金山,张永青,赵高瞻,梁伟.Ti含量对Al-Mn合金铸态组织的影响[J].特种铸造及有色合金,2010,30(09):867-870+783. DOI：

Yang Yongjun, Zhang Jinshan, Zhang Yongqing, et al. Effects of Ti Content on As-cast Microstructure of Al-Mn Alloy. [J]. Special Casting & Nonferrous Alloys 30(9):867-870(2010) DOI：

摘要

采用真空感应熔炼、水冷金属型（铜模）冷却凝固的方法

在高Al、低Mn和低Ti合金中制备出铝合金准晶相。通过光学显微镜、X射线衍射、扫描电镜和EDS分析技术

确定了准晶相的组织和相成分。分析了由于合金成分不同

特别是Ti元素含量不同对合金的显微组织及相组成的影响。结果表明

Al-Mn二元合金主要由准晶十边形T相和它的类似晶体相（Al4Mn相）组成;Ti元素的加入能细化准晶T相晶粒

并能抑制类似晶体相的形成;当Ti元素摩尔分数大于3%时

在合金中观察到有花瓣状组织出现。经过X射线衍射和EDS分析

确定其为准晶相

成分为Al67Mn13Ti20。

Abstract

The aluminum alloy quasicrystal phase was prepared in the high aluminum

low manganese and low Ti alloy by vacuum induction melting and water-cooled copper mold. Effects of alloy composition

especially Ti content

on the microstructure and phase composition in the alloy were investigated by optical microscope （OM）

X-ray diffraction

scanning electron microscope（SEM） and EDS （energy dispersive spectrometer）. The results show that the prepared Al-Mn alloy is composed of decagonal quasicrystal T phase and its similar crystal phase （Al4Mn）. Ti addition can refine quasicrystal T phase grains and inhibit the formation of similar crystal phase. With Ti element more than 3% in atom percentage

some petal-like microstructure is observed in the alloy

which is identified as Al67Mn13Ti20 quasicrystal phase by X-ray diffraction and EDS analysis.