Microstructure and mechanical properties of powder metallurgy Ti-Al-Mo-V-Ag alloy

来源期刊:中国有色金属学报(英文版)2011年第6期

论文作者:肖代红 袁铁锤 欧小琴 贺跃辉

文章页码:1269 - 1276

关键词:钛合金;粉末冶金;银;显微组织;力学性能

Key words:titanium alloys; powder metallurgy (PM); Ag; microstructure; mechanical properties

摘    要:

通过粉末冶金元素混合法,制备含αβ相的Ti-Al-Mo-V-Ag合金。通过X射线衍射、金相观察、扫描电镜观察及力学性能测试,研究Ag的添加及烧结温度对Ti-5Al-4Mo-4V合金的组织与性能影响。结果表明:Ag的添加能提高粉末冶金Ti-5Al-4Mo-4V合金的的相对密度,改善合金的力学性能;在1 250 °C下烧结4 h后,Ti-5Al-4Mo-4V-5Ag合金的相对密度及抗压缩强度分别达到96.3%和1 656 MPa。

Abstract:

The Ti-Al-Mo-V-Ag α+β alloys were processed by powder metallurgy (PM) using the blended elemental (BE) technique. The effects of Ag addition and sintering temperature on microstructure and properties of the Ti-5Al-4Mo-4V alloys were investigated using X-ray diffraction, optical microscope, scanning electron microscope and mechanical properties tests. The results show that adding Ag element increases the relative density and improves the mechanical properties of PM Ti-5Al-4Mo-4V alloy. After sintering at 1 250 °C for 4 h, the relative density and compression strength of Ti-5Al-4Mo-4V-5Ag alloy are 96.3% and 1 656 MPa, respectively.

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