Bimorphic microstructure in Ti-6Al-4V alloy manipulated by spark plasma sintering and in-situ press forging

被引：58

作者：

Kang, L. M. ^{[1
]}

Cai, Y. J. ^{[1
]}

Luo, X. C. ^{[1
]}

Li, Z. J. ^{[1
]}

Liu, X. B. ^{[1
]}

Wang, Z. ^{[2
]}

Li, Y. Y. ^{[2
]}

Yang, C. ^{[2
]}

机构：

[1] Guangzhou Railway Polytech, Guangzhou 510430, Peoples R China

[2] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Peoples R China

来源：

SCRIPTA MATERIALIA | 2021年 / 193卷

基金：

中国国家自然科学基金;

关键词：

Key Titanium alloys; Spark plasma sintering; Forging; Microstructure; Mechanical properties; MECHANICAL-PROPERTIES; COMPOSITES; TEMPERATURE; STRENGTH;

D O I：

10.1016/j.scriptamat.2020.10.035

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report on a methodology of powder sintering and in-situ press forging, which can be used to ma-nipulate a new bimorphic microstructure in Ti-6Al-4V alloy. The microstructure contains typical triangle colonies with ultrafine lamellar alpha and 9, and their border areas with ultrafine equiaxed alpha, dispersed nano/ultrafine 9, as well as alpha/9 interface L layers. Surprisingly, the bimorphic alloy exhibits excellent mechanical properties under both tensile and compressive conditions, far superior to other Ti-6Al-4V alloys and their composites reported so far. Therefore, this innovative methodology provides a simple and economical method for preparing high-performance metallic alloys in structural applications. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：43 / 48

页数：6

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