Effect of alpha phase characteristics on the high cycle fatigue properties of Ti-6Al-4V alloy

Xu Yan, Hongchao C. Kou, Fengbo B. Han, Bin Tang, Lijun J. Zhang, Jinshan S. Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

In this paper, high cycle fatigue (HCF) properties of Ti-6Al-4V alloys prepared by different forging processes have been investigated. Optical microscopy (OM) and Transmission electron microscopy (TEM) were used to characterize microstructure, and the fatigue fracture micromechanisms were analyzed. Fracture surfaces of specimens were observed by scanning electron microscopy (SEM) to identify the macroscopic fracture mode. It was found that die forging at high temperature would increase the proportion of low angle grain boundary in equiaxed primary α phase and lead to lamella secondary α coarsen with the appearance of dislocation networks, which would make the HCF properties decline. Besides, it showed that the HCF properties increase with increasing the volume fraction of primary α.

Original languageEnglish
Title of host publicationSpecial and High Performance Structural Materials
EditorsYafang Han, Ying Wu, Guangxian Li, Fusheng Pan, Runhua Fan, Xuefeng Liu
PublisherTrans Tech Publications Ltd
Pages259-265
Number of pages7
ISBN (Print)9783038357612
DOIs
StatePublished - 2016
EventChinese Materials Conference on Special and High Performance Structural Materials, CMC 2015 - Guiyang, China
Duration: 10 Jul 201514 Jul 2015

Publication series

NameMaterials Science Forum
Volume849
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

ConferenceChinese Materials Conference on Special and High Performance Structural Materials, CMC 2015
Country/TerritoryChina
CityGuiyang
Period10/07/1514/07/15

Keywords

  • Dislocation networks
  • High cycle fatigue
  • Ti-6Al-4V alloy
  • α phase

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