Microstructure-Dependent Local Fatigue Cracking Resistance of Bimodal Ti-6Al-4V Alloys

被引：6

作者：

Zeng, Ling-Rong ^{[1
,2
]}

Lei, Li-Ming ^{[3
]}

Yang, Jia ^{[1
,2
]}

Luo, Xue-Mei ^{[1
]}

Zhang, Guang-Ping ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd Shenyang, Shenyang 110016, Liaoning, Peoples R China

[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

[3] AECC Shanghai Commercial Aircraft Engine Mfg Co L, 77 Hongyin Rd, Shanghai 201306, Peoples R China

来源：

ADVANCED ENGINEERING MATERIALS | 2018年 / 20卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Crack growth rate; Fatigue; grain boundary; microstructure; Ti alloy; ALPHA/BETA-TITANIUM-ALLOY; GROWTH-BEHAVIOR; INITIATION; PROPAGATION; SURFACES; GEOMETRY; TEXTURE; SLIP;

D O I：

10.1002/adem.201700702

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fatigue crack growth behavior of the bimodal Ti-6Al-4V alloys with two different volume fractions of the primary phase (alpha(p)) of 76 and 36% is investigated by the in situ testing technique. The experimental results show that the crack growth rate of the alpha(p) = 36% Ti-6Al-4V alloy is lower than that of the alpha(p) = 76% one. The local fatigue crack growth rate is evidently decreased by the various boundaries including alpha(p) grain boundaries, boundaries between the alpha(p) phase and basketweave microstructure, and alpha/beta lamellar interfaces. A criterion associated with the boundary characteristics is obtained to evaluate the grain boundary resistance to the fatigue crack growth in the engineering alloys.

引用

页数：5

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