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

Yuya Okura, Hirotoshi Sasaki, Hitoshi Soyama

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルAdvanced Surface Enhancement - Proceedings of the 1st International Conference on Advanced Surface Enhancement INCASE 2019—Research Towards Industrialisation
編集者Sho Itoh, Shashwat Shukla
出版社Springer
ページ88-96
ページ数9
ISBN(印刷版)9789811500534
DOI
出版ステータスPublished - 2020
イベント1st International Conference on Advanced Surface Enhancement, INCASE 2019 - Singapore, Singapore
継続期間: 2019 9 102019 9 12

出版物シリーズ

名前Lecture Notes in Mechanical Engineering
ISSN(印刷版)2195-4356
ISSN(電子版)2195-4364

Conference

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

ASJC Scopus subject areas

  • 自動車工学
  • 航空宇宙工学
  • 機械工学
  • 流体および伝熱

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