MATEC Web Conf.
Volume 321, 2020The 14th World Conference on Titanium (Ti 2019)
|Number of page(s)||5|
|Section||Microstructure - Properties Relationships|
|Published online||12 October 2020|
The fracture behavior transitions in cold dwell fatigue of Ti-6Al-4V
Technology platform center, IHI Corporation, 1,Shin-nakaharacho, Isogo-ku, Yokohama, Japan IHI Asia Pacific Thailand, 11th and 12th Floor, Ramaland Building, 952 Rama IV Road, Suriyawongse, Bangrak, Bangkok 10500, Thailand
Ti-6Al-4V forged materials which had fine grain size and commercial billet which had moderate grain size and micro texture were prepared. Cold dwell fatigue tests were conducted using both materials, and dwell time condition was up to 1800s. Fracture cycles and elongation were almost same on each specimen. Number of cycle to failure decreased with increase of dwell time. Fracture elongation increased up to dwell time of 10s, and it was constant in over 10s. Fracture surface were observed. In short time dwell condition up to 2s, fracture surface showed fatigue type. Fracture surfaces changed to dimple in over 10s dwell. In billet material, facets were observed in inner area of fracture surface.
© The Authors, published by EDP Sciences, 2020
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