Effects of Solution Treatment on the Microstructure and Mechanical Properties of Ti-22Al-25Nb Alloys

被引：10

作者：

Wu, Yang ^{[1
]}

Kou, Hongchao ^{[1
]}

Tang, Bin ^{[1
]}

Liu, Degui ^{[2
]}

Li, Jizhen ^{[1
]}

Li, Jinshan ^{[2
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

[2] AVIC Beijing Aeronaut Mfg Technol Res Inst, Beijing 100024, Peoples R China

来源：

ADVANCED ENGINEERING MATERIALS | 2017年 / 19卷 / 07期

关键词：

GRAIN-GROWTH KINETICS; BETA-TITANIUM ALLOY; MELTING DEPOSITED TI-5AL-5MO-5V-1CR-1FE; HEAT-TREATMENT; TENSILE PROPERTIES; HIGH-STRENGTH; COOLING RATE; PHASE; BEHAVIOR; EVOLUTION;

D O I：

10.1002/adem.201700081

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of solution treatment on the microstructure and mechanical properties of Ti-22Al-25Nb alloy are investigated. Numerous equiaxed (2) particles distribute in a B2 matrix after solution treatment in the alpha(2)+B2 region. The growth rate of the B2 grain increases with solution temperature and decreases with increasing holding time. When the solution temperature is lower than B2-transus, it is seen that both the strength and ductility decrease with increasing solution temperature and holding time. After being solution-treated at a super-transus temperature, the alloy with a fully B2 microstructure shows an ultralow elongation (similar to 5%) and a typical brittle fracture characteristic.

引用

页数：7

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