Fabrication of a High-density Fine-grain P/M Titanium Alloy by Mechanical Alloy and Vacuum Sintering

Long Yan; Li Yuanyuan; Li Xiaoqiang; Wang Junwen; Zhang Datong

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Fabrication of a High-density Fine-grain P/M Titanium Alloy by Mechanical Alloy and Vacuum Sintering
Issue 9, Pages: 584-587(2006)
Published： 2006 ，
DOI：

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[1]龙雁,李元元,李小强,王郡文,张大童.机械合金化-真空烧结法制备致密细晶钛合金[J].特种铸造及有色合金,2006(09):584-587+534-535.

Long Yan, Li Yuanyuan, Li Xiaoqiang, et al. Fabrication of a High-density Fine-grain P/M Titanium Alloy by Mechanical Alloy and Vacuum Sintering. [J]. Special Casting & Nonferrous Alloys (9):584-587(2006)
[1]龙雁,李元元,李小强,王郡文,张大童.机械合金化-真空烧结法制备致密细晶钛合金[J].特种铸造及有色合金,2006(09):584-587+534-535. DOI：

Long Yan, Li Yuanyuan, Li Xiaoqiang, et al. Fabrication of a High-density Fine-grain P/M Titanium Alloy by Mechanical Alloy and Vacuum Sintering. [J]. Special Casting & Nonferrous Alloys (9):584-587(2006) DOI：

摘要

采用机械合金化-真空烧结方法制备出致密细晶钛合金（Ti-6Al-2Sn-4Zr-6Mo）

并研究了球磨时间、烧结温度等制备条件对烧结材料密度和显微组织的影响规律。结果表明

随着球磨时间的增加

钛合金烧结材料的密度逐渐升高

显微组织从初生α相+针状的转变β组织逐步转化为细等轴状的α+β组织

并且其晶粒尺寸逐渐减小。当球磨时间为40h

烧结温度为1200℃时

烧结材料的相对密度达到99.1%

平均晶粒尺寸仅为2μm。

Abstract

A high-density fine-grain P/M titanium alloy of Ti-6Al-2Sn-4Zr-6Mo was prepared by mechanical alloying and vacuum sintering process. Effects of ball-milling time and sintering temperature on density and microstructure of the P/M titanium alloy have been investigated. The experimental observation shows that with increasing in ball-milling time

the density of Ti alloy is increased and its microstructure is converted from primary α phase and needle-like β phase into fine equiaxed α+β phase

in which the grain size is decreased gradually. The relative density of sintered materials with average grain size of only 2 μm reaches 99.1% with ball-milling time of 40 h and sintering at 1 200 ℃.