Hall-Petch relationship and substructural evolution in boron-containing type 316L stainless steel
- Indian Inst. of Tech., Bombay (India). Dept. of Metallurgical Engineering and Materials Science
- Univ. of Manitoba, Winnipeg, Manitoba (Canada)
Tensile specimens of Type 316L stainless steel, containing boron and having grain sizes in the range 3.1 to 103.8 {micro}m, were deformed at 24, 400 and 700 C at a constant strain rate of 1 {times} 10{sup {minus}4} s{sup {minus}1}. The flow stress ({sigma}) varies with strain ({var_epsilon}) and grain size (d) according to the Hall-Petch (H-P) type relationship {sigma}({var_epsilon}) = a {var_epsilon}{sup n} + b {var_epsilon}{sup m}d{sup {minus}0.5} with the H-P parameters ({sigma}{sub 0} and k) interrelated through the constants a, n and b, m. The presence of boron affects the flow stress and changes the H-P parameters, depending on test temperature. The dislocation density increases with temperature due to dynamic strain aging, which leads to some anomalous effects of grain size at 700 C.
- OSTI ID:
- 514659
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 6 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
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