SYMPOSIA PAPER Published: 01 January 1985

Fatigue Crack Growth Behavior in a Nitrogen-Strengthened High-Manganese Steel at Cryogenic Temperatures


The fatigue crack growth rate (FCGR) of a nitrogen-strengthened high-manganese stainless steel of nominal composition 18Mn-5Ni-16Cr-0.02C-0.22N was determined in the intermediate stress-intensity factor range (20–70 MPa√m) at 77 and 4 K. Fractographic investigations were performed on the fracture surfaces. The FCGR at 4 K was very nearly the same as at 77 K and substantially below the FCGR for AISI 304LN steel. The fracture surfaces of both the high-manganese alloy and the 304LN showed a transgranular failure mode, but the detailed fractographic features varied with temperature and alloy type. The fractography was closely related to changes in the FCGR.

Author Information

Ogawa, R
Morris, JW
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Developed by Committee: E08
Pages: 47–59
DOI: 10.1520/STP32746S
ISBN-EB: 978-0-8031-4924-3
ISBN-13: 978-0-8031-0411-2