Fatigue testing and properties of hardmetals in the gigacycle range

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• 作者：Agnieszka Betzwar Kotas^a ; ; Herbert Danninger^a ; Brigitte Weiss^b ; Ken Mingard^c ; Jose Sanchez^d ; Luis Llanes^e
• 关键词：Gigacycle fatigue ; WC-Co hardmetals ; Ultrasonic fatigue testing ; Fatigue endurance strength ; Fracture mechanics ; Crack initiation
• 刊名：International Journal of Refractory Metals and Hard Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：62
• 期：part_PB
• 页码：183-191
• 全文大小：1942 K
• 卷排序：62

文摘

S-N graphs up to 10E10 cycles are presented for different hardmetal grades. Ultrasonic resonance testing is shown to be well suited for fatigue testing of hardmetals. No fatigue “limit” was found but the S-N curves drop consistently. Crack initiation is microstructure-controlled and not defect-controlled.