Effect of thermal cycling treatment on the mechanical properties of low-alloy chromium
The authors report the results of a study of the effect of structural changes occurring during thermal cycling treatment in low-alloy chromium on mechanical properties. Low-alloy chromium containing 0.5 wt.% lanthanum and 0.25 wt.% tantalum was selected as test material, as well as unalloyed chromium. It is concluded that thermal cycling treatment of chromium and low-alloy chromium leads to an increase in flow stresses as the result of forming a strengthened nitrogen-containing surface layer. Alloying of chromium with lanthanum and tantalum, apart from increasing the low-temperature ductility, increases its resistance to thermal cycling. In alloy specimens subjected to prior impregnation with nitrogen, the effect ot thermal cycling strengthening and embrittlement is more clearly defined. In unalloyed chromium under the action of thermal cycling treatment, the region of strain aging shifts in the direction of lower temperature.
- Research Organization:
- Institute of Material Sciences, Academy of Sciences of the Ukranian SSR, Kiev
- OSTI ID:
- 6088581
- Journal Information:
- Strength Mater. (Engl. Transl.); (United States), Vol. 17:2; Other Information: Translated from Problemy Prochnosti, No. 2, pp. 29-33, February, 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHROMIUM
HEAT TREATMENTS
MECHANICAL PROPERTIES
CHROMIUM BASE ALLOYS
THERMAL CYCLING
LANTHANUM ADDITIONS
METALLURGICAL EFFECTS
TANTALUM ADDITIONS
ABSORPTION
CHEMICAL COMPOSITION
DUCTILITY
EMBRITTLEMENT
NITROGEN
STRAIN AGING
TEMPERATURE EFFECTS
THERMAL STRESSES
AGING
ALLOYS
CHROMIUM ALLOYS
ELEMENTS
LANTHANUM ALLOYS
METALS
NONMETALS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
STRESSES
TANTALUM ALLOYS
TENSILE PROPERTIES
TRANSITION ELEMENTS
360101* - Metals & Alloys- Preparation & Fabrication
360103 - Metals & Alloys- Mechanical Properties