Improvement of Fatigue Strength of Additive Manufactured Metals by Solid-Liquid-Gas Interfacial Phenomena Induced by Pulse Laser

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Abstract

Although additive manufactured (AM) metals are attractive materials, the fatigue strength of AM metals are considerably weak comparing with that of wrought materials. The mechanical surface treatment such as shot peening can improve the fatigue strength of metallic materials. Recently, a novel mechanical surface treatment using solid-liquid-gas interfacial phenomena induced by pulse laser has been developed. In the present paper, in order to demonstrate the improvement of fatigue strength of AM metals by solid-liquid-gas interfacial phenomena, titanium alloy Ti6Al4V manufactured by electron beam melting EBM was treated by submerged pulse laser and tested by a plane bending fatigue test. The key factors were investigated by evaluating the relation between the fatigue properties and mechanical properties of the surface treated by submerged laser peening, cavitation peening and shot peening.

Original languageEnglish
Article number012002
JournalIOP Conference Series: Materials Science and Engineering
Volume611
Issue number1
DOIs
Publication statusPublished - 2019 Oct 24
Event2019 International Conference on Advanced Material Research and Processing Technology, AMRPT 2019 - Wuhan, China
Duration: 2019 Jul 192019 Jul 21

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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