SYMPOSIA PAPER Published: 01 January 1974

Fracture Properties of a Cold-Worked Mild Steel


An AISI 1018 steel was rolled various amounts between 0 and 50 percent, after which it was partially stress relieved, and the following properties measured: smooth tensile, Charpy V-notch versus test temperature, fracture toughness, stress corrosion cracking susceptibility, and fatigue crack growth rate.

The yield strength was increased almost three-fold by rolling, and the upper-shelf Charpy V-notch toughness was reduced to approximately one third its unrolled value. The fracture toughness was only moderately changed, and the crack growth rate in fatigue (da/dN) unchanged by rolling. There was no subcritical crack growth in distilled water on sustained loading to KI values just less than KIC for periods up to 64 h; however, da/dN in distilled water was higher than its dry value if fatigue loading was slow.

Author Information

Ripling, EJ
Materials Research Laboratory, Inc., Glenwood, Ill.
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Developed by Committee: E08
Pages: 59–73
DOI: 10.1520/STP38592S
ISBN-EB: 978-0-8031-5583-1
ISBN-13: 978-0-8031-0367-2