Mechanical property and microstructure evolution of nitrogen-modified Ti-6Al-4V alloy with core-shell structure by hot compression

被引：6
作者：
Zhou, X. [1 ]
Ma, T. F. [1 ]
Zhang, L. C. [2 ]
Zhang, Y. S. [1 ]
Zhang, P. X. [1 ]
机构：
[1] Northwest Inst Nonferrous Met Res, Xian 710016, Shaanxi, Peoples R China
[2] Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia
来源：
MATERIALS CHARACTERIZATION | 2018年 / 142卷
关键词：
Core-shell; Flow stress; Microstructure evolution; Ti-6Al-4 V alloy; TI-BASED COMPOSITES; DEFORMATION-BEHAVIOR; PHASE-TRANSFORMATION; STARTING STRUCTURE; MATRIX COMPOSITES; TITANIUM-ALLOYS; HIGH-STRENGTH; TC4-DT ALLOY; ARCHITECTURE; TEMPERATURE;
D O I：
10.1016/j.matchar.2018.05.051
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Core-shell (CS) structured Ti-6Al-4V (Ti64) alloy with single a shells and duplex alpha + beta cores was fabricated by powder nitriding and spark plasma sintering. The mechanical property and microstructure evolution of CS-Ti64 alloy was investigated by compression at temperatures of 950-1100 degrees C and strain rates of 0.001(-1) s(-1). The nitrogen-induced solid solution strengthening and the nitrogen-stabilized CS structure significantly enhanced the compressive strength. Microstructure evolution of CS-Ti64, involved inhomogeneous deformation of the core and shell, which was quite different from that of the commercial Ti64. Regions adjacent to shells and central locations of cores suffered large strain and therefore preferentially underwent dynamic recrystallization (DRX). The deformation mechanism of the novel CS-Ti64 alloy was discussed in terms of the a shells, a laths and DRX.
引用
收藏
页码：270 / 275
页数：6
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