Journal
JOURNAL OF MANUFACTURING PROCESSES
Volume 36, Issue -, Pages 255-263Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jmapro.2018.10.017
Keywords
Linear friction welding; Microstructural evolution; Dynamic recrystallization; Tensile strength; Impact toughness
Categories
Funding
- National Natural Science Foundation of China [51675435]
- Research Fund of the State Key Laboratory of Solidification Processing (NPU, China) [122-QZ-2015]
- 111 Project [B08040]
- National Key Research and Development Program of China [2016YFB1100104]
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In this study, a near-alpha titanium alloy (Ti-6Al-2Zr-1Mo-1V) was welded with linear friction welding (LFW). The microstructural evolution and mechanical properties of the joint were evaluated. Results show that grains are remarkably refined in the weld center zone due to dynamic recrystallization because of the effect of thermomechanical coupling, while the fractions of deformation grains, sub-structure grains and recrystallized grains are significantly different from those of the base metal (BM). The room temperature tensile strength of the welded joint is not lower than that of the BM, because all the failure occurs in the BM. It is more interesting to find that the joint impact toughness is increased by 19.1% compared to the BM.
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