Fatigue Crack Growth of Ultrafine Grained Pure Ti after Severe Plastic Deformation

Chang Young Hyun; Ho Kyung Kim

doi:10.4028/www.scientific.net/SSP.124-126.1385

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HomeSolid State PhenomenaSolid State Phenomena Vols. 124-126Fatigue Crack Growth of Ultrafine Grained Pure Ti...

Fatigue Crack Growth of Ultrafine Grained Pure Ti after Severe Plastic Deformation

Abstract:

Fatigue crack growth behavior of the ultrafine-grained pure Ti produced by ECAP was investigated. The ECAPed sample with a total strain of 4.6 showed nearly equiaxed grains with an average size of about 0.3 μm. After ECAP, the ultimate tensile strength was increased by 60%, while the tensile elongation was decreased by 31%. The ECAPed Ti showed much higher resistance in fatigue crack growth by about a factor of 4 over the whole +K due to plasticity-induced crack closure.

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Periodical:

Solid State Phenomena (Volumes 124-126)

Pages:

1385-1388

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.124-126.1385

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Online since:

June 2007

Authors:

Chang Young Hyun, Ho Kyung Kim

Keywords:

Equal-Channel Angular Pressing (ECAP), Fatigue Crack Growth (FCG), Load Ratio, Pure Ti, Ultrafine Grained

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