Ramberg-Osgood strain-hardening characterization on an ASTM A302-B steel
- Westinghouse Electric Corp., West Mifflin, PA (United States). Bettis Atomic Power Lab.
Many elastic-plastic fracture mechanisms analysis procedures require knowledge of the true stress versus true strain response of the material being analyzed. The most common strain-hardening relationship employed is of the form first proposed by Ramberg and Osgood. Here, the Ramberg-Osgood strain-hardening exponents and coefficients are characterized for an unirradiated ASTM A302-B steel over a wide range of temperatures from {minus}129 to 260 C. The strain-hardening exponent increases only slightly with temperature over this range, while the coefficient decreases with increasing temperature. Tensile specimens irradiated to 0.002, 0.029, and 0.046 dpa exhibited significant increases in the strain-hardening exponent with increasing neutron irradiation level.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 131625
- Journal Information:
- Journal of Pressure Vessel Technology, Vol. 117, Issue 4; Other Information: PBD: Nov 1995
- Country of Publication:
- United States
- Language:
- English
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