Effect of Plasma Nitriding on Ultra-High Cycle Fatigue Behaviors of Ti-6Al-4V

Ren Hui Tian; Qiao Lin Ouyang; Qingyuan Wang

doi:10.4028/www.scientific.net/AMR.295-297.2386

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 295-297Effect of Plasma Nitriding on Ultra-High Cycle...

Effect of Plasma Nitriding on Ultra-High Cycle Fatigue Behaviors of Ti-6Al-4V

Abstract:

In order to investigate the effect of plasma nitriding treatment on fatigue behavior of titanium alloys, very high cycle fatigue tests were carried out for Ti-6Al-4V alloy using an ultrasonic fatigue machine under load control conditions for stress ratios of R=-1 at frequency of ƒ=20KHz. Experiment results showed that plasma nitriding treatment played the principal role in the internal fatigue crack initiation. More importantly, plasma nitriding treatment had a detrimental effect on fatigue properties of the investigated Ti-6Al-4V alloy, and the fatigue strength of material after plasma nitriding treatment appeared to be significantly reduced about 17% over the untreated material.

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Periodical:

Advanced Materials Research (Volumes 295-297)

Pages:

2386-2389

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.295-297.2386

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Online since:

July 2011

Authors:

Ren Hui Tian, Qiao Lin Ouyang, Qingyuan Wang

Keywords:

Plasma Nitriding, Subsurface Crack Initiation, Ti6Al4V, Very Long Life Fatigue

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