Communication

Influence of Parent Metal Microstructure and Post-Weld Heat Treatment on Microstructure and Mechanical Properties of Linear Friction Welded Ti-6Al-4V Joint†

  1. Wenya Li1,2,*,
  2. Hui Wu1,
  3. Tiejun Ma1,
  4. Changlin Yang1,
  5. Zhongwei Chen1

Article first published online: 8 FEB 2012

DOI: 10.1002/adem.201100203

Issue

Advanced Engineering Materials

Advanced Engineering Materials

Volume 14, Issue 5, pages 312–318, May 2012

Additional Information

How to Cite

Li, W., Wu, H., Ma, T., Yang, C. and Chen, Z. (2012), Influence of Parent Metal Microstructure and Post-Weld Heat Treatment on Microstructure and Mechanical Properties of Linear Friction Welded Ti-6Al-4V Joint. Adv. Eng. Mater., 14: 312–318. doi: 10.1002/adem.201100203

Author Information

  1. 1

    State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi'an 710072, P. R. China

  2. 2

    School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China

*School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China.

  1. †

    The authors would like to thank for financial support from the National Natural Science Foundation of China (51005180), the Doctoral Fund of Ministry of Education of China for Young Teachers, the Research Fund of the State Key Laboratory of Solidification Processing (NPU, China) (69-QP-2011), the Program for New Century Excellent Talents in University by the Ministry of Education of China (NECT-08-0463) and the 111 Project (B08040).

Publication History

  1. Issue published online: 8 MAY 2012
  2. Article first published online: 8 FEB 2012
  3. Manuscript Accepted: 26 DEC 2011
  4. Manuscript Received: 27 JUL 2011

Funded by

  • National Natural Science Foundation of China. Grant Number: 51005180

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Abstract

Linear friction welding (LFW) of Ti-6Al-4V (Ti-64) titanium alloy with a different microstructure from the previous study was conducted. The joint microstructure, tensile strength and fracture characteristics were studied. Results show that the microstructure of parent metal has a strong influence on the microstructure and properties of LFW Ti-64 joints. Under the specific conditions in this study, unexpected spheric α grains were formed near the bondline, which leads to the steep drop of the joint tensile strength. Although the tensile strength could be improved through post-weld heat treatment, the failure of specimens still took place across the bondline with the cleavage fracture due to the formation of basket-weave structure at the weld center zone and the remaining of spheric α grains.

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