Journal ArticleDOI
Microstructural optimization through heat treatment for enhancing the fracture toughness and fatigue crack growth resistance of selective laser melted Ti6Al4V alloy
Punit Kumar,Upadrasta Ramamurty +1 more
TLDR
In this paper, the authors showed that duplex annealing at temperatures below the β transus temperature of the alloy would lead to such a microstructure while retaining the mesostructure, whose nature depends on the process parameter combinations utilized.About:
This article is published in Acta Materialia.The article was published on 2019-05-01. It has received 188 citations till now. The article focuses on the topics: Fracture toughness & Paris' law.read more
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Defects in additive manufactured metals and their effect on fatigue performance: A state-of-the-art review
TL;DR: In this paper, the authors review the literature on the influential microstructural attributes on fatigue performance of additive manufacturing (AM) parts with a focus on generated defects, including defect-based, microstructure-sensitive, and multiscale models.
Journal ArticleDOI
Fracture and fatigue in additively manufactured metals
TL;DR: In this article, a comprehensive review of the current understanding of the structure-property correlations in AM alloys is provided, with an emphasis on the interplay between the microstructures and process attributes in determining the structural integrity of AM components in terms of properties such as near-threshold fatigue crack growth rate, fracture toughness, and fatigue strength.
Journal ArticleDOI
Boron modified titanium alloys
Gaurav Singh,Upadrasta Ramamurty +1 more
TL;DR: In this article, microstructural refinements with trace addition of B in Ti alloys are reviewed with emphasis on the microstructure-property correlations, and the results show that processing response of the as-cast alloys improved as a result of grain refinement due to B addition, leading to the possibility of removal or minimization of primary ingot breakdown steps.
Journal ArticleDOI
Fatigue strength of additively manufactured 316L austenitic stainless steel
TL;DR: The microstructures and mechanical properties of the 316L austenitic stainless steel fabricated using binder jet printing (BJP) and selective laser melting (SLM) were investigated and compared with those of the conventionally manufactured (CM) alloy, with particular emphasis on the unnotched fatigue resistance as discussed by the authors.
Journal ArticleDOI
High cycle fatigue in selective laser melted Ti-6Al-4V
Punit Kumar,Upadrasta Ramamurty +1 more
TL;DR: In this paper, the effect of process parameters such as laser power (w), layer thickness (t), and scan rotation (ϕ) on pore size, shape and distribution in selectively laser melted (SLM) Ti-6Al-4V alloy specimens and the influence of porosity characteristics on the HCF life under rotating bending fatigue conditions were investigated.
References
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Book
Fatigue of materials
TL;DR: In this article, the cyclic deformation and fatigue crack initiation in polycrystalline ductile solids was studied and a total-life approach was proposed to deal with the problem.
Journal ArticleDOI
Heat treatment of Ti6Al4V produced by Selective Laser Melting: Microstructure and mechanical properties
TL;DR: In this paper, the effect of several heat treatments on the microstructure and mechanical properties of Ti6Al4V processed by Selective Laser Melting (SLM) is studied.
Journal ArticleDOI
Influence of processing on microstructure and mechanical properties of (α+β) titanium alloys
TL;DR: In this paper, the relationship between processing, microstructure, and mechanical properties of two-phase (α+β) titanium alloys is summarized and the advantages of a bi-modal (duplex) type of micro-structure usable for most applications are discussed.
Journal ArticleDOI
Metal Additive Manufacturing: A Review of Mechanical Properties
John J. Lewandowski,Mohsen Seifi +1 more
TL;DR: A review of published data on the mechanical properties of additively manufactured metallic materials can be found in this paper, where the additive manufacturing techniques utilized to generate samples covered in this review include powder bed fusion (eBM, SLM, DMLS) and directed energy deposition (eBF3).
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.