Journal ArticleDOI
Anisotropy of fatigue crack growth in wire arc additive manufactured Ti-6Al-4V
TLDR
In this paper, the effects of crack growth direction on the fatigue crack growth of wire arc additive manufactured Ti-6Al-4V were studied, and the results showed that the FCGR of vertical sample is 5% higher than that of horizontal sample when the stress intensity factor, ΔK is smaller than ΔKT.Abstract:
The effects of crack growth direction on the fatigue crack growth of wire arc additive manufactured Ti-6Al-4V were studied. The fatigue crack growth rate (FCGR) of horizontal and vertical samples has different stress intensity factor transition point, ΔKT, which is 11.3 MPa m1/2 and 10.3 MPa m1/2, respectively. The FCGR of vertical sample is 5% higher than that of horizontal sample when the stress intensity factor, ΔK is smaller than ΔKT. The difference in FCGR is resulted from the microstructure characterization and the fatigue crack growth direction.read more
Citations
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Journal ArticleDOI
A new approach to correlate the defect population with the fatigue life of selective laser melted Ti-6Al-4V alloy
Yanan Hu,Shengchuan Wu,Shengchuan Wu,Zhengkai Wu,X.L. Zhong,Saad Ahmed,S. Karabal,Xianghui Xiao,Hui-Lan Zhang,Philip J. Withers +9 more
TL;DR: In this article, the defect-tolerant design of SLM Ti-6Al-4V alloy was evaluated in terms of the defect population using a combination of the statistics of extremes and the Murakami model.
Journal ArticleDOI
The effect of defect population on the anisotropic fatigue resistance of AlSi10Mg alloy fabricated by laser powder bed fusion
Zhengkai Wu,Shengchuan Wu,Jianguang Bao,Jianguang Bao,Weijian Qian,Suleyman Karabal,Wei Sun,Philip J. Withers +7 more
TL;DR: In this article, X-ray computed tomography (CT) has been used to characterise the defect population for laser powder bed fusion processed AlSi10Mg alloy and correlated with the tensile and high cycle fatigue (HCF) properties of specimens loaded both parallel and perpendicular to build direction.
Journal ArticleDOI
Reducing arc heat input and obtaining equiaxed grains by hot-wire method during arc additive manufacturing titanium alloy
TL;DR: In this paper, a hot-wire arc additive manufacturing method was adopted to reduce the arc heat input and refine the columnar grains, and four thin-walled samples with the material of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si were manufactured.
Journal ArticleDOI
Multi-scale defects in powder-based additively manufactured metals and alloys
TL;DR: In this paper , a review of multi-scale defects in AMed metals and alloys are identified and for the first time classified into three categories, including geometry related, surface integrity related and microstructural defects.
Journal ArticleDOI
Effects of build direction on tensile and fatigue performance of selective laser melting Ti6Al4V titanium alloy
TL;DR: In this article, the effects of build direction on tensile and fatigue performance of Ti6Al4V manufactured by the selective laser melting technique were designed and manufactured in three different build direction.
References
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Journal ArticleDOI
Metal Additive Manufacturing: A Review
TL;DR: The state-of-the-art of additive manufacturing (AM) can be classified into three categories: direct digital manufacturing, free-form fabrication, or 3D printing as discussed by the authors.
Journal ArticleDOI
A study of the microstructural evolution during selective laser melting of Ti–6Al–4V
TL;DR: In this article, the development of the microstructure of the Ti-6Al-4V alloy processed by selective laser melting (SLM) was studied by light optical microscopy.
Journal ArticleDOI
An overview on the use of titanium in the aerospace industry
TL;DR: Titanium and titanium alloys are excellent candidates for aerospace applications owing to their high strength to weight ratio and excellent corrosion resistance as discussed by the authors.However, titanium usage is strongly limited by its higher cost relative to competing materials, primarily aluminum alloys and steels.
Journal ArticleDOI
On the mechanical behaviour of titanium alloy TiAl6V4 manufactured by selective laser melting: Fatigue resistance and crack growth performance
Stefan Leuders,M. Thöne,Andre Riemer,Thomas Niendorf,Thomas Tröster,Hans Albert Richard,Hans Jürgen Maier +6 more
TL;DR: In this article, the microstructure-defect-property relationship under cyclic loading for a TiAl6V4 alloy processed by selective laser melting is investigated. And the results show that the micron sized pores mainly affect fatigue strength, while residual stresses have a strong impact on fatigue crack growth.
Journal ArticleDOI
Wire + Arc Additive Manufacturing
Stewart W. Williams,Filomeno Martina,Adrian C. Addison,Jialuo Ding,Goncalo Pardal,Paul A. Colegrove +5 more
TL;DR: In this article, the benefits of non-destructive testing, online monitoring and in situ machining are discussed, and strategies on how to manage residual stress, improve mechanical properties and eliminate defects such as porosity are suggested.