The influence of substructure on the elevated and room temperature strength of a 26 Cr-1 Mo ferritic stainless steel

Autor:	Charles G. Schmidt, Rodney H. Klundt, Oleg D. Sherby, Conrad M. Young, Bruno Walser
Rok vydání:	1982
Předmět:	Compressive strength Materials science Strain (chemistry) Misorientation Mechanics of Materials Metallurgy Metals and Alloys Atmospheric temperature range Strain rate Flow stress Condensed Matter Physics Microstructure Grain size
Zdroj:	Metallurgical Transactions A. 13:447-456
ISSN:	2379-0180 0360-2133
DOI:	10.1007/bf02643353
Popis:	The high temperature flow stress behavior of an electron beam melted 26 Cr-1 Mo ferritic stainless steel was determined for large torsion strains (e ~ 15) over a temperature range from 400 °C (750 °F) to 1000 °C (1830 °F) and a strain rate range from 6 × 10-3 to 6.3 s-1. The room temperature compressive yield strength measured after torsional warm working was also investigated. It was found that the high temperature flow strength and the room temperature compressive yield strength were strong functions of the subgrain size. Strain softening was observed during warm working while the room temperature compressive yield strength was found to increase with prior torsional strain. The increase in the subgrain misorientation angle and, to a lesser extent, the subgrain shape change that occurs with increased warm working strain appear to be responsible for the strain dependence of the flow stress at both elevated and low temperatures.
Databáze:	OpenAIRE
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