Effect of Peening Methods on Improvement of Fatigue Strength of Titanium Alloy Ti6Al4V Manufactured by Electron Beam Melting

2018 ◽  
Vol 2018 (0) ◽  
pp. GS0702
Author(s):  
Hitoshi SOYAMA ◽  
Yuya OKURA
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Fatigue Strength ◽  
Electron Beam Melting ◽  
Titanium Alloy Ti6al4v

scholarly journals Effect of Various Peening Methods on the Fatigue Properties of Titanium Alloy Ti6Al4V Manufactured by Direct Metal Laser Sintering and Electron Beam Melting

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2216 ◽  
Author(s):  
Hitoshi Soyama ◽  
Fumio Takeo
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Fatigue Strength ◽  
Shot Peening ◽  
Electron Beam Melting ◽  
Surface Hardness ◽  
Laser Sintering ◽  
Laser Peening ◽  
Direct Metal Laser Sintering ◽  
Titanium Alloy Ti6al4v

Titanium alloy Ti6Al4V manufactured by additive manufacturing (AM) is an attractive material, but the fatigue strength of AM Ti6Al4V is remarkably weak. Thus, post-processing is very important. Shot peening can improve the fatigue strength of metallic materials, and novel peening methods, such as cavitation peening and laser peening, have been developed. In the present paper, to demonstrate an improvement of the fatigue strength of AM Ti6Al4V, Ti6Al4V manufactured by direct metal laser sintering (DMLS) and electron beam melting (EBM) was treated by cavitation peening, laser peening, and shot peening, then tested by a plane bending fatigue test. To clarify the mechanism of the improvement of the fatigue strength of AM Ti6Al4V, the surface roughness, residual stress, and surface hardness were measured, and the surfaces with and without peening were also observed using a scanning electron microscope. It was revealed that the fatigue strength at N = 107 of Ti6Al4V manufactured by DMLS was slightly better than that of Ti6Al4V manufactured by EBM, and the fatigue strength of both the DMLS and EBM specimens was improved by about two times through cavitation peening, compared with the as-built ones. An experimental formula to estimate fatigue strength from the mechanical properties of a surface was proposed.

scholarly journals Producing Of High-strength Titanium Alloy Vt22 By Method Of Electron Beam Melting

2018 ◽  
Vol 2018 (3) ◽  
pp. 8-15
Author(s):  
S.V. Akhonin ◽  
◽  
V.A. Berezos ◽  
A.N. Pikulin ◽  
A.Yu. Severin ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Electron Beam Melting ◽  
High Strength ◽  
Alloy Vt22 ◽  
Titanium Alloy Vt22

Fatigue strength of an (α + β)-type titanium alloy Ti-6Al-4V produced by the electron-beam physical vapor deposition method

2006 ◽  
Vol 38 (6) ◽  
pp. 651-658 ◽  
Author(s):  
O. N. Gerasimchuk ◽  
G. A. Sergienko ◽  
V. I. Bondarchuk ◽  
A. V. Terukov ◽  
Yu. S. Nalimov ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Electron Beam ◽  
Fatigue Strength ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Deposition Method ◽  
Physical Vapor Deposition Method
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