Fatigue Crack Initiation of Cr-Mo-V Steel in High-Temperature Environment

K Wada; Y Iino; M Suzuki

doi:10.1520/STP32439S

SYMPOSIA PAPER Published: 01 January 1982

STP32439S

Fatigue Crack Initiation of Cr-Mo-V Steel in High-Temperature Environment

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The fatigue crack initiation behavior of chromium-molybdenumvanadium steel in high-temperature air and steam was studied in respect with the cyclic frequency and oxygen concentration in the surrounding atmosphere. Fatigue tests were conducted at 565°C in air and steam at frequencies of 10, 1, and 0.1 cpm. The number of cycles to crack initiation was determined by the potential drop technique. It was found that the fatigue life to crack initiation is significantly reduced by decreasing frequency. At a low cycling frequency, the oxygen concentration determines the reduction of cycles to crack initiation. In the case of crack initiation related to inclusions, the reduction of number of cycles to crack initiation is remarkable.

Author Information

Wada, K

Mitsubishi Heavy Industries Ltd., Sagamihara Machinery Works, Sagamihara, Japan

Iino, Y

Toyota Technological Institute, Nagoya, Japan

Suzuki, M

Toyota Technological Institute, Nagoya, Japan

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Details

Developed by Committee: E08

Pages: 422–435

DOI: 10.1520/STP32439S

ISBN-EB: 978-0-8031-4835-2

ISBN-13: 978-0-8031-0713-7

Fatigue Crack Initiation of Cr-Mo-V Steel in High-Temperature Environment

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