+Advanced Search
A special metallographical corrosion behavior and its mechanism of hexagonal martensite α′ for titanium alloys
Author:
Affiliation:

College of Materials Science and Engineering, Taiyuan University of Technology

Clc Number:

Fund Project:

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

    Hexagonal martensite α′ gets special metallographical corrosion behavior: the inner microstructure of some grains shows unobvious contrast after corrosion, however, some other grains have obvious corrosion character, namely the inner vimineous α′ array orthogonally. In present work, the mechanism of this corrosion behavior was studied based on OM, AFM and EBSD analyses. It’s found that: there are three groups of orthogonal precipitation directions of α′ when transformed from original β phase, if the metallographical observation surface is parallel or near-parallel to any one of the three groups of orthogonal precipitation directions, then this group of α′ plates must array orthogonally or parallelly. Under this circumstance, α′ plates are perpendicular to the observation surface, thus the α′/α′ interfaces are deep, which leads to deep corrosion depth, and finally deep corrosion characters are shown. For a given grain, the two arrangement modes of α′ plates can exist simultaneously, which appears orthogonal array mode as a whole.

    Reference
    Related
    Cited by
Get Citation

[Xiaohui Shi, Cao Zuhan, Zhang Min, Guo Ruipeng, Qiao Junwei, Wu Yucheng. A special metallographical corrosion behavior and its mechanism of hexagonal martensite α′ for titanium alloys[J]. Rare Metal Materials and Engineering,2020,49(6):1989~1994.]
DOI:10.12442/j. issn.1002-185X.20190368

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:April 27,2019
  • Revised:May 25,2019
  • Adopted:June 14,2019
  • Online: July 09,2020
  • Published: