Rapid Synthesis of a Near-β Titanium Alloy by Blended Elemental Powder Metallurgy (BEPM) with Induction Sintering

被引：12

作者：

Jia, Mingtu ^{[1
]}

Gabbitas, Brian ^{[1
]}

机构：

[1] Univ Waikato, Waikato Ctr Adv Mat, Sch Engn, Hamilton 3240, New Zealand

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2015年 / 46A卷 / 10期

关键词：

MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; HEAT-TREATMENT; DIFFUSION; INTERDIFFUSION; STRENGTH; BEHAVIOR;

D O I：

10.1007/s11661-015-3048-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A near-beta Ti-13V-11Cr-3Al alloy was produced by blended elemental powder metallurgy combining warm compaction and induction sintering. Two Ti-13V-11Cr-3Al powder compacts with different oxygen content were manufactured by mixing PREP and HDH Ti powders with Cr and AlV master alloy powders, respectively. The effect of isothermal holding time, at a sintering temperature of 1573 K (1300 A degrees C), on pore characteristics and compositional homogeneity was investigated in this study. Pore coarsening by Ostwald ripening occurred with an increase in the isothermal holding time and Kirkendall voids were produced by a reaction between Ti and Cr. After an isothermal holding time of 10 minutes, the two sintered powder compacts had a homogeneous composition. Ti/AlV and Ti/Cr diffusion couples were used to predict the distribution of alloying elements, and the binary Ti-V, Ti-Al, and Ti-Cr interdiffusion coefficients were consistent with the distribution of alloying elements after isothermal holding. The mechanical properties of sintered powder compacts, prepared using PREP Ti powder as the raw powder, were optimized by sintered density and pore size.

引用

页码：4716 / 4729

页数：14

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