Journal ArticleDOI
Interior initiation and early growth of very high cycle fatigue crack in an additively manufactured Ti-alloy
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Very high cycle fatigue of an additively manufactured Ti-6Al-4V is studied at R = -1, 0.1 and 0.2 in this paper , where the fracture surface of crack initiation and early growth region presents fine granular area (FGA) morphology with discontinuous regions of nanograins.About:
This article is published in International Journal of Fatigue.The article was published on 2022-03-01. It has received 14 citations till now. The article focuses on the topics: Paris' law & Alloy.read more
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Defect induced cracking and modeling of fatigue strength for an additively manufactured Ti-6Al-4V alloy in very high cycle fatigue regime
Chengqi Sun,Nancy L Segal +1 more
TL;DR: In this article , the effect of artificial surface defect on high cycle fatigue and VHCF strength is modeled, i.e., the fatigue strength σ, fatigue life N and defect size area (square root of the projection area of defect perpendicular to principal stress direction) is expressed as σ=CNaarean,N
High cycle and very high cycle fatigue of TC17 titanium alloy: stress ratio effect and fatigue strength modeling
Journal ArticleDOI
Nanograin formation and cracking mechanism in Ti alloys under very high cycle fatigue loading
TL;DR: In this paper , a new mechanism for crack initiation and early growth in Ti alloys was proposed, where the nanograin regions and the boundaries between the Nanograin and coarse grain regions become preferential sites for crack formation.
Journal ArticleDOI
Mechanism of artificial surface defect induced cracking for very high cycle fatigue of Ti alloys
Jian Sun,W.Y. Peng,Cheng Sun +2 more
TL;DR: In this paper , in-situ observation of crack growth and electron backscatter diffraction observation of microstructure around artificial surface defect and at mated crack surfaces are conducted for very high cycle fatigue (VHCF) of TC17 alloy.
Journal ArticleDOI
Multi-field coupling fatigue behavior of laser additively manufactured metallic materials: A review
Fei Liu,Huimin Xie,Wei He +2 more
TL;DR: In this article , the authors reviewed the latest research progress in improving the fatigue properties of superalloys manufactured by laser directed energy deposition (L-DED) and laser powder bed fusion (L PBF) techniques.
References
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Journal ArticleDOI
Additive manufacturing of metals
TL;DR: In this paper, the authors describe the complex relationship between additive manufacturing processes, microstructure and resulting properties for metals, and typical microstructures for additively manufactured steel, aluminium and titanium are presented.
Journal ArticleDOI
Microstructure and mechanical behavior of Ti-6Al-4V produced by rapid-layer manufacturing, for biomedical applications.
Lawrence E Murr,Stella Quinones,Sara M. Gaytan,M.I. Lopez,A. Rodela,E. Martinez,D.H. Hernandez,E. Martinez,Francisco Medina,Ryan B. Wicker +9 more
TL;DR: The microstructure and mechanical behavior of simple product geometries produced by layered manufacturing using the electron beam melting (EBM) process and the selective laser melting (SLM) process are compared with those characteristic of conventional wrought and cast products of Ti-6Al-4V.
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Fatigue performance evaluation of selective laser melted Ti–6Al–4V
Paul D. Edwards,Mamidala Ramulu +1 more
TL;DR: In this paper, the authors evaluated the fatigue properties of Ti-6Al-4V specimens produced by the Selective Laser Melting additive manufacturing process and found that the fatigue life is significantly lower compared to wrought material.
Journal ArticleDOI
Factors influencing the mechanism of superlong fatigue failure in steels
Y Murakam,T Nomoto,T Ueda +2 more
TL;DR: In this article, a particular fatigue fracture morphology in the vicinity of the fracture origin (non-metallic inclusions) of a heat-treated alloy steel, SCM435, was tested to N ≥ 10 8.