TY - GEN
T1 - Effect of Mechanical Properties on Fatigue Life Enhancement of Additive Manufactured Titanium Alloy Treated by Various Peening Methods
AU - Okura, Yuya
AU - Sasaki, Hirotoshi
AU - Soyama, Hitoshi
N1 - Funding Information:
This work was partly supported by JSPS KAKENHI Grant Number 17H03138 and 18KK0103.
Publisher Copyright:
© 2020, Springer Nature Singapore Pte Ltd.
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
KW - Additive manufacturing
KW - Cavitation peening
KW - Fatigue strength
KW - Laser shock peening
KW - Residual stress
KW - Shot peening
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U2 - 10.1007/978-981-15-0054-1_10
DO - 10.1007/978-981-15-0054-1_10
M3 - Conference contribution
AN - SCOPUS:85072860436
SN - 9789811500534
T3 - Lecture Notes in Mechanical Engineering
SP - 88
EP - 96
BT - Advanced Surface Enhancement - Proceedings of the 1st International Conference on Advanced Surface Enhancement INCASE 2019—Research Towards Industrialisation
A2 - Itoh, Sho
A2 - Shukla, Shashwat
PB - Springer
T2 - 1st International Conference on Advanced Surface Enhancement, INCASE 2019
Y2 - 10 September 2019 through 12 September 2019
ER -