Effects of internal hydrogen on fatigue strength of commercially pure titanium

Hideaki Nishikawa, Yasuji Oda, Hiroshi Noguchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Commercially Pure Titanium (CP-Ti) usually contains a few tens of ppm hydrogen. In order to investigate the effect of such internal hydrogen on the fatigue characteristics, rotating bending fatigue tests were carried out on two kinds of specimen with different hydrogen contents: one contains 34 ppm but the other 3 ppm. The amount of internal hydrogen was controlled by changing the annealing conditions. The fatigue process was successively observed by a replication technique. The higher hydrogen content specimen showed a longer fatigue life, longer crack initiation life and higher fatigue limit than those of the lower hydrogen specimen. No specimen showed any particular fatigue crack growth behavior related to hydrogen content, whereas the crack initiation behavior differed somewhat. The fatigue-crack initiation site of the higher hydrogen content specimen with a longer fatigue life preferred the interior of a grain. On the other hand, that of the lower hydrogen specimen preferred the neighborhood of a grain boundary.

Original languageEnglish
Title of host publication17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures
Pages1289-1296
Number of pages8
Volume2
Publication statusPublished - 2008
Event17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17 - Brno, Czech Republic
Duration: Sep 2 2008Sep 5 2008

Other

Other17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17
Country/TerritoryCzech Republic
CityBrno
Period9/2/089/5/08

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

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