Surface roughness and fatigue properties of selective laser melted Ti-6Al-4V alloy

Zhuoer Chen, Sheng Cao, Xinhua Wu, Chris H.J. Davies

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Researchpeer-review

2 Citations (Scopus)

Abstract

Surface roughness of selective laser melted Ti-6Al-4V alloy in as-built status is unsatisfactory for cyclic loading applications because surface defects can lead to a premature fatigue crack initiation. In this study, a trade-off between surface quality and production rate is considered in the design of laser processing parameters. It was found that higher production of selective laser melting (SLM) process inevitably leads to a higher surface roughness. With as-fabricated surface condition, samples made with laser parameters of higher production rates showed a poorer fatigue performance. The comparison of fatigue properties between machined samples and net-shape samples shows that surface roughness is a controlling factor of fatigue performance in SLM products.

Original languageEnglish
Title of host publicationAdditive Manufacturing for the Aerospace Industry
EditorsFrancis Froes, Rodney Boyer
Place of PublicationAmsterdam Netherlands
PublisherElsevier
Chapter13
Pages283-299
Number of pages17
ISBN (Electronic)9780128140635
ISBN (Print)9780128140628
DOIs
Publication statusPublished - 2019

Keywords

  • Fatigue crack initiation
  • Heat treatment
  • Hot isostatic pressing
  • SLM productivity
  • Staircase effect
  • Surface roughness

Cite this

Chen, Z., Cao, S., Wu, X., & Davies, C. H. J. (2019). Surface roughness and fatigue properties of selective laser melted Ti-6Al-4V alloy. In F. Froes, & R. Boyer (Eds.), Additive Manufacturing for the Aerospace Industry (pp. 283-299). Elsevier. https://doi.org/10.1016/B978-0-12-814062-8.00015-7