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Materials and Manufacturing Processes Volume 33, 2018 - Issue 8
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Original Articles

TiH2-based Ti-1Al-8V-5Fe PM alloys with different addition methods of alloying elements

Yanan ZhangSchool of Aeronautics and Astronautics, Sichuan University, Chengdu, China
,
Chunming WangCollege of Materials Science and Engineering, Sichuan University, Chengdu, ChinaORCID Iconhttp://orcid.org/0000-0003-3564-8176
ORCID Icon,
Yeguang ZhangSchool of Aeronautics and Astronautics, Sichuan University, Chengdu, China
,
Yuhang WeiCollege of Materials Science and Engineering, Sichuan University, Chengdu, China
,
Sufen XiaoCollege of Materials Science and Engineering, Sichuan University, Chengdu, China
&
Yungui ChenCollege of Materials Science and Engineering, Sichuan University, Chengdu, ChinaCorrespondence[email protected]
ORCID Iconhttp://orcid.org/0000-0001-8403-7289
ORCID Icon
Pages 849-855 | Received 08 Jun 2017, Accepted 15 Aug 2017, Published online: 21 Sep 2017
 
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ABSTRACT

The powder metallurgy high-strength Ti-1Al-8V-5Fe alloy (Ti-185 alloy) was investigated in this paper with different addition methods of alloying elements, Al, V, Fe pure elements powder (EP) or 1Al-8V-5Fe ternary master alloy powder (MAP), based on TiH2 powders at the sintering temperature from 1150 to 1350°C. The results indicate that the Ti-185 alloy with the 1Al-8V-5Fe master alloy (Ti-185 MAP alloy) possesses the higher relative sintered density, less oxygen content, and less α-phase volume fraction versus the Ti-185 alloy with Al, V, and Fe pure elements (Ti-185 EP alloy). No matter where the sintering temperature is 1150, 1250, or 1350°C, Ti-185 MAP alloy invariably has the higher yield strength and hardness which have a strong relationship to its higher density and less volume fraction of softer α-phase in comparison with Ti-185 EP alloy.

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