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Fatigue behaviour of Ti6Al4V alloy components manufactured by SLM subjected to HIP and residual stress relief
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  • Joel da Silva de Jesus,
  • Luis Borrego,
  • José Ferreira,
  • Jose Costa,
  • Carlos Capela
Joel da Silva de Jesus
Universidade de Coimbra Departamento de Engenharia Mecanica

Corresponding Author:joel.jesus@uc.pt

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Luis Borrego
ISEC, Polytechnic Institute of Coimbra
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José Ferreira
University of Coimbra
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Jose Costa
University of Coimbra
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Carlos Capela
Instituto Politecnico de Leiria Escola Superior de Tecnologia e Gestao
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Abstract

Fatigue behaviour of HIPed and stress relieved Ti6Al4V alloy specimen’s produced by SLM was analysed (Rε = -1). The HIP process caused a microstructural transformation decreasing the hardness and monotonic properties that not allowed fatigue strength increase. A bilinear behaviour in the elastic strain-fatigue life curve was observed, because of Young´s modulus decrease during the cyclic elasto-plastic tests consequence of subgrains formation. The Smith-Watson-Topper and total strain energy density models showed a good concordance between predicted and experimental fatigue lives in notched samples.

Peer review status:ACCEPTED

11 Nov 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
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12 Nov 2020Submission Checks Completed
12 Nov 2020Assigned to Editor
15 Nov 2020Reviewer(s) Assigned
08 Dec 2020Review(s) Completed, Editorial Evaluation Pending
19 Dec 2020Editorial Decision: Revise Major
13 Jan 20211st Revision Received
15 Jan 2021Submission Checks Completed
15 Jan 2021Assigned to Editor
15 Jan 2021Reviewer(s) Assigned
11 Feb 2021Review(s) Completed, Editorial Evaluation Pending
18 Feb 2021Editorial Decision: Revise Minor
18 Feb 20212nd Revision Received
22 Feb 2021Submission Checks Completed
22 Feb 2021Assigned to Editor
23 Feb 2021Review(s) Completed, Editorial Evaluation Pending
24 Feb 2021Editorial Decision: Accept