+Advanced Search
Influence of microstructure homogeneity on high-cycle fatiguecrack initiation of Ti-55531 alloy with lamellar microstructure
Author:
Affiliation:

State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an,,Northwest Institute for Nonferrous Metal Research,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an

  • Article
  • | |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • | |
  • Comments
    Abstract:

    The influence of microstructure homogeneity on crack intiation behavior under high-cycle fatigue (HCF) test at room temperature was studied in Ti-55531 alloy with lamellar microstructure by TEM and SEM methods. 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 inhomogenious regions in microstructure significantly effect the HCF behavior of lamellar Ti-55531 alloy. Fatigue microcracks mainly initiated at interfaces between αs and β phases owing to their different structure and properties. Moreover, small amount of microcracks initiated at GB α and αs phases during fatigue.

    Reference
    Related
    Cited by
Get Citation

[Huang Chaowen, Zhao Yongqing, Xin Shewei, Zhou Wei, Li Qian, Zeng Weidong. Influence of microstructure homogeneity on high-cycle fatiguecrack initiation of Ti-55531 alloy with lamellar microstructure[J]. Rare Metal Materials and Engineering,2017,46(3):663~668.]
DOI:[doi]

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:April 21,2016
  • Revised:June 29,2016
  • Adopted:July 15,2016
  • Online: May 18,2017