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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Azevedo, Nuno Monteiro |
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Pfeifer, Tanja
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Publications (6/6 displayed)
- 2022Optimization of the post-process heat treatment strategy for a Near-α Titanium base alloy produced by laser powder bed fusioncitations
- 2022On the existence of orthorhombic martensite in a near-α titanium base alloy used for additive manufacturingcitations
- 2022Formation and evolution of precipitates in an additively manufactured near-α titanium base alloycitations
- 2021Mechanical Properties of Selective Laser-Melted Components of AlSi10Mg for Prototype Vehiclescitations
- 2020Selective Laser Melting of a Near-alpha Ti6242S Alloy for High-Performance Automotive Partscitations
- 2018Investigation on the Liquid Flow ahead of the Solidification Front During the Formation of Peritectic Layered Solidification Structure
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article
Optimization of the post-process heat treatment strategy for a Near-α Titanium base alloy produced by laser powder bed fusion
Abstract
During the last decades, titanium alloys have been of great interest for lightweight applications due to their high strength in combination with a low material density. Current research activities focus on the investigation of near-α titanium alloys produced by laser powder bed fusion (LPBF). These alloys are known for their superior tensile strength and high creep resistance. This study focuses on the optimization of post-process heat treatments and the impact on tensile and creep strength of a LPBF produced Ti6242S alloy. Therefore, a variety of annealing steps were conducted to gain knowledge about the decomposition process of the non-equilibrium as-built microstructure and the arising influence on the mechanical properties. Components made of Ti6242S and produced by LPBF reveal an extraordinarily high ultimate tensile strength of about 1530 MPa at room temperature, but show a low elongation at fracture (A5 = 4.3%). Based on microstructure-property relationships, this study recommends precise heat treatments on how to improve the desired mechanical properties in terms of strength, ductility as well as creep resistance. Moreover, this study shows a triplex heat treatment, which enhances the elongation at fracture (A5) to 16.5%, while the ultimate tensile strength is still at 1100 MPa.