Ti40阻燃钛合金电子束焊接头组织与力学性能<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.016.024

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Abstract The Ti40 thick and Ti40 burn resistant titanium alloy in 2 mm was welded by electron beam with different welding parameter. Microstructure and mechanical properties of Ti40 burn resistant titanium alloy joints were studied by metallographic analysis, electron probe microanalysis, room-temperature tensile test and micro-hardness test. The results showed that β columnar crystal with intragranular slice layer structure and a few equiaxed β grain were distributed in the weld seam. Additionally, grain size of weld seam became finer from fusion line to the seam center and the heat affected zone is not distinct. Specifically, micro defects were easy to appear in the joints, such as pores and cracks, which could be effectively controlled by straight scanning waveform, and it would lead to the improvement of joint strength. The tensile strength of Ti40 burn resistant titanium alloy with straight scanning waveform EBW could reach at 917 MPa and the fracture was characterized with brittle and ductile fracture. The maximum hardness of the weld zone was 376HV which was higher than the base metal.

Key words： Ti40 burn resistant titanium alloy electron beam welding microstructure mechanical property

Published: 25 August 2017 Online: 2018-05-07

CLC number:

TG456.3

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	Articles by authors
	JIANG Chang
	HUANG Chunping
	XIA Chun
	KE Liming

Cite this article:

JIANG Chang,HUANG Chunping,XIA Chun, et al. Microstructure and Mechanical Properties of Ti40 Burn Resistant Titanium Alloy Joints by Electron Beam Welding[J]. Materials Reports, 2017, 31(16): 117-120.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.016.024 OR https://www.mater-rep.com/EN/Y2017/V31/I16/117

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