Effect of Mechanical Properties on Fatigue Life Enhancement of Additive Manufactured Titanium Alloy Treated by Various Peening Methods

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Additive manufacturing (AM) of metallic materials is attractive processing for biomedical implants and aviation components. However, fatigue life of AM parts are remarkably weak. Mechanical surface treatment such as cavitation peening, shot peening and laser peening can improve the fatigue life of AM parts. In the present paper, in order to demonstrate the fatigue life enhancement of AM parts by various peening methods, titanium alloy Ti6Al4V manufactured by electron beam melting EBM was treated by cavitation peening, shot peening and laser peening, and then tested by a plane bending fatigue test. And also, in order to make clear mechanism on the fatigue life enhancement of AM parts, mechanical properties such as residual stress, yield stress and hardness were evaluated, and the correlation between the mechanical properties and the fatigue life was investigated. Note that the yield stress was evaluated by an inverse analysis using an indentation test. It was concluded that the fatigue life of Ti6Al4V manufactured by EBM was proportional to a parameter defined by residual stress, yield stress, surface roughness and hardness.

Original languageEnglish
Title of host publicationAdvanced Surface Enhancement - Proceedings of the 1st International Conference on Advanced Surface Enhancement INCASE 2019—Research Towards Industrialisation
EditorsSho Itoh, Shashwat Shukla
PublisherSpringer
Pages88-96
Number of pages9
ISBN (Print)9789811500534
DOIs
Publication statusPublished - 2020 Jan 1
Event1st International Conference on Advanced Surface Enhancement, INCASE 2019 - Singapore, Singapore
Duration: 2019 Sep 102019 Sep 12

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364

Conference

Conference1st International Conference on Advanced Surface Enhancement, INCASE 2019
CountrySingapore
CitySingapore
Period19/9/1019/9/12

Keywords

  • Additive manufacturing
  • Cavitation peening
  • Fatigue strength
  • Laser shock peening
  • Residual stress
  • Shot peening

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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