+Advanced Search
Effect of strain rate on microstructure and mechanical properties of TC18 thick plate by electron beam welding
DOI:
Author:
Affiliation:

Key Laboratory of Solidification Processing,Shaanxi Key Laboratory of Friction Welding Technologies,Northwestern Polytechnical University,Xi’an,Key Laboratory of Solidification Processing,Shaanxi Key Laboratory of Friction Welding Technologies,Northwestern Polytechnical University,Xi’an,Key Laboratory of Solidification Processing,Shaanxi Key Laboratory of Friction Welding Technologies,Northwestern Polytechnical University,Xi’an

Clc Number:

TG442

Fund Project:

Key areas of innovation team in Shaanxi Province (No. 2014KCT-12)

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

    The influence of strain rate of Microstructures, tensile properties and strain hardening behavior of the electron beam welded joint for TC18 titanium alloy under optimized welding parameters were investigated with three slices (top, middle and bottom). The results showed that the welding led to significant microstructural changes across the joint. The microstructure of fusion zone is composed of coarsened β phase and secondary α-phase. Compared with the base metal, the joint slices along the thickness exhibited a lower strength and plasticity but a further higher hardening capacity. The strength and ductility of the bottom slices are higher than those of the middle and top slices. The maximum yield strength and ultimate tensile strength of the welding slices reached the base metal 83% at the strain rate of 1×10-2 s-1. The hardening capacity of welding slices decreased with increasing strain rate. It was significantly enhanced at the middle and bottom slices than the top slice. Tensile fracture occurred in the weld zone.The fracture process of the top slice is cleavage fracture. However, the middle and bottom slices are quasi-cleavage crack.

    Reference
    Related
    Cited by
Get Citation

[Han Wen, Fu Li, Chen Haiyan. Effect of strain rate on microstructure and mechanical properties of TC18 thick plate by electron beam welding[J]. Rare Metal Materials and Engineering,2018,47(7):2005~2010.]
DOI:[doi]

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:November 28,2017
  • Revised:March 22,2018
  • Adopted:April 02,2018
  • Online: October 10,2018
  • Published: