Influence of heat treatment on microhardness and microstructure of the joining interface for Ti-24Al-15Nb-1.5Mo/TC11

Ying Ying Liu, Xin Lin, Wen Xin Zhang, Yuan Bo Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The microhardness and microstructure of Ti-24Al-15Nb-1.5Mo/TC11 dual alloy joining interface processed by different heat treatment regimes were investigated. The results show that the microhardness of the weld zone and Ti-24Al-15Nb-1.5Mo alloy side of the dual alloy processed by gradient heat treatment are higher than that of the specimen processed by balance heat treatment. Moreover, the microstructure differences between the specimens processed by gradient heat treatment and balance heat treatment are very obvious, particularly in the interface between the TC11 alloy and the weld zone. While the joining interface is processed by gradient heat treatment, the microstructure change homogeneously, and the demarcation lines are ambiguous. However, for the joining interface processed by balance heat treatment, the demarcation lines are very obvious, and the microstructure of the TC11 alloy side is bi-morphic, the a lath is short and coarse. Therefore, the interface integrity of the dual alloy processed by gradient heat treatment is better, which is an adoptable method to improve the properties of the dissimilar alloy joining interface.

Original languageEnglish
Title of host publicationMaterials and Processes Technologies V
PublisherTrans Tech Publications Ltd
Pages2030-2034
Number of pages5
ISBN (Print)9783038351214
DOIs
StatePublished - 2014

Publication series

NameAdvanced Materials Research
Volume941-944
ISSN (Print)1022-6680
ISSN (Electronic)1662-8985

Keywords

  • Heat treatment
  • Microhardness
  • Microstructure
  • Ti-24Al-15Nb-1.5Mo/TC11

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