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The influence of initial microstructures on the diffusion bonding interface of high Nb containing TiAl alloy

  • Northwestern Polytechnical University Xian
  • CSR Zhuzhou Electric Co., Ltd
  • Beijing Institute of Astronautical Systems Engineering

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

Abstract

The solid-state diffusion bonding experiments of high Nb containing TiAl alloy were successfully carried out at 950°C under a uniaxial pressure of 30MPa for 45min, and the influence of different initial microstructures, such as initial forged microstructure (named duplex microstructure) with different grain sizes, near lamellar microstructure and full lamellar microstructure, on the interface of the bonding joints were investigated. And the microstructure characterization of interfaces was taken by OM, SEM, EDS and micro-hardness tester. The results indicated that the grain size and strain energy are of great importance to improve the quality of interfacial bonding. Besides, the interfacial microstructure was found different from matrix and changed during the diffusion bonding process. Meanwhile, micro-hardness tests of the three kinds of joints showed that the micro-hardness in the interface was slightly higher than matrix in all the joints, resulted from the working hardening of the interface under the uniaxial pressure.

Original languageEnglish
Title of host publicationMaterials Processing and Manufacturing III
Pages396-401
Number of pages6
DOIs
StatePublished - 2013
Event3rd International Conference on Advanced Engineering Materials and Technology, AEMT 2013 - Zhangjiajie, China
Duration: 11 May 201312 May 2013

Publication series

NameAdvanced Materials Research
Volume753-755
ISSN (Print)1022-6680

Conference

Conference3rd International Conference on Advanced Engineering Materials and Technology, AEMT 2013
Country/TerritoryChina
CityZhangjiajie
Period11/05/1312/05/13

Keywords

  • Diffusion bonding
  • Micro-hardness
  • Microstructure
  • TiAl alloy

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