Influence of Microstructure Homogeneity on High-Cycle Fatigue Crack Initiation of Ti-55531 Alloy with Lamellar Microstructure

Chaowen Huang; Yongqing Zhao; Shewei Xin; Wei Zhou; Qian Li; Weidong Zeng

Influence of Microstructure Homogeneity on High-Cycle Fatigue Crack Initiation of Ti-55531 Alloy with Lamellar Microstructure

Chaowen Huang
, Yongqing Zhao
, Shewei Xin
, Wei Zhou
, Qian Li
, Weidong Zeng

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian
Northwest Institute for Nonferrous Metal Research

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The influence of microstructure homogeneity on crack initiation behavior under high-cycle fatigue (HCF) test at room temperature was studied in Ti-55531 alloy with lamellar microstructure by TEM and SEM. The results show that the HCF strength of Ti-55531 alloy could be as high as 639 MPa. However, a small amount of grain boundary (GB) α and a large number of inhomogeneous regions in microstructure significantly affect the HCF behavior of lamellar Ti-55531 alloy. Fatigue microcracks mainly initiate at interfaces between α_s and β_r phases owing to their different structures and properties. Moreover, a small amount of microcracks initiate at GB α and α_s phases during fatigue.

Original language	English
Pages (from-to)	663-668
Number of pages	6
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	46
Issue number	3
State	Published - 1 Mar 2017

Keywords

Crack initiation
High-cycle fatigue
Microstructure homogeneity
Ti-55531 titanium alloy

Cite this

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title = "Influence of Microstructure Homogeneity on High-Cycle Fatigue Crack Initiation of Ti-55531 Alloy with Lamellar Microstructure",

abstract = "The influence of microstructure homogeneity on crack initiation behavior under high-cycle fatigue (HCF) test at room temperature was studied in Ti-55531 alloy with lamellar microstructure by TEM and SEM. The results show that the HCF strength of Ti-55531 alloy could be as high as 639 MPa. However, a small amount of grain boundary (GB) α and a large number of inhomogeneous regions in microstructure significantly affect the HCF behavior of lamellar Ti-55531 alloy. Fatigue microcracks mainly initiate at interfaces between αs and βr phases owing to their different structures and properties. Moreover, a small amount of microcracks initiate at GB α and αs phases during fatigue.",

keywords = "Crack initiation, High-cycle fatigue, Microstructure homogeneity, Ti-55531 titanium alloy",

author = "Chaowen Huang and Yongqing Zhao and Shewei Xin and Wei Zhou and Qian Li and Weidong Zeng",

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TY - JOUR

T1 - Influence of Microstructure Homogeneity on High-Cycle Fatigue Crack Initiation of Ti-55531 Alloy with Lamellar Microstructure

AU - Huang, Chaowen

AU - Zhao, Yongqing

AU - Xin, Shewei

AU - Zhou, Wei

AU - Li, Qian

AU - Zeng, Weidong

PY - 2017/3/1

Y1 - 2017/3/1

N2 - The influence of microstructure homogeneity on crack initiation behavior under high-cycle fatigue (HCF) test at room temperature was studied in Ti-55531 alloy with lamellar microstructure by TEM and SEM. The results show that the HCF strength of Ti-55531 alloy could be as high as 639 MPa. However, a small amount of grain boundary (GB) α and a large number of inhomogeneous regions in microstructure significantly affect the HCF behavior of lamellar Ti-55531 alloy. Fatigue microcracks mainly initiate at interfaces between αs and βr phases owing to their different structures and properties. Moreover, a small amount of microcracks initiate at GB α and αs phases during fatigue.

AB - The influence of microstructure homogeneity on crack initiation behavior under high-cycle fatigue (HCF) test at room temperature was studied in Ti-55531 alloy with lamellar microstructure by TEM and SEM. The results show that the HCF strength of Ti-55531 alloy could be as high as 639 MPa. However, a small amount of grain boundary (GB) α and a large number of inhomogeneous regions in microstructure significantly affect the HCF behavior of lamellar Ti-55531 alloy. Fatigue microcracks mainly initiate at interfaces between αs and βr phases owing to their different structures and properties. Moreover, a small amount of microcracks initiate at GB α and αs phases during fatigue.

KW - Crack initiation

KW - High-cycle fatigue

KW - Microstructure homogeneity

KW - Ti-55531 titanium alloy

UR - https://www.scopus.com/pages/publications/85020134618

M3 - 文章

AN - SCOPUS:85020134618

SN - 1002-185X

VL - 46

SP - 663

EP - 668

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 3

ER -

Influence of Microstructure Homogeneity on High-Cycle Fatigue Crack Initiation of Ti-55531 Alloy with Lamellar Microstructure

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