Metastable phase-assisted nucleation in a near-alpha titanium matrix composite with network architecture

被引：2

作者：

Zhang, Rui ^{[1
,2
]}

Wang, DongJun ^{[1
,3
,4
]}

Yuan, ShiJian ^{[1
,3
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Shenyang, Liaoning, Peoples R China

[3] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Heilongjiang, Peoples R China

[4] Minist Educ, Key Lab Microsyst & Microstruct Mfg, Harbin 150001, Heilongjiang, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2019年 / 35卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Titanium matrix composite; secondary alpha phase; crystallography; precipitation mechanism; TIBW/TA15; COMPOSITE; SECONDARY ALPHA; MICROSTRUCTURAL FEATURES; MECHANICAL-PROPERTIES; EPITAXIAL-GROWTH; HEAT-TREATMENT; BETA-PHASE; TI ALLOY; PRECIPITATION; EVOLUTION;

D O I：

10.1080/02670836.2019.1570702

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The secondary alpha (alpha(s)) phase is an important component of a novel TiBw/TA15 composite with network architecture. In order to investigate the precipitation mechanism of the alpha(s) phase, the microstructure after multi-directional forging was characterised by EPMA, EBSD, and TEM. The results showed that several differently sized alpha(s) phases separated out from the (Mo and V)-enriched phase, which was composed of a nano-sized metastable omega phase along with some retained beta phase. It could be also found that the metastable omega phase would transform to the alpha phase when adequate activation energy was provided. The precipitation mechanism of the alpha(s) phase in this composite has been discussed in detail and it can be inferred as an omega-assisted heterogeneous nucleation process.

引用

页码：306 / 312

页数：7

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