Use of the reverse martensitic transformation and precipitation to enhance the strength and stability of austenite
Conference
·
OSTI ID:7223309
The addition of martensitic and reverse martensitic phase transformations to precipitation hardening results in significant strengthening of Fe--Ni--Ti austenitic alloys due to the transformation-induced defects. Multiple cycles of ..gamma..--..cap alpha..'--..gamma.. transformations led to a further strengthening. The stability of ausaged austenite as well as ausaged and transformation strengthened austenite is improved significantly through a final isothermal treatment at 500/sup 0/C. This stabilization results in an increase of both the strength and the ductility in less stable (mechanically) austenites while only the increase of ductility was observed in relatively stable austenites.
- Research Organization:
- California Univ., Berkeley (USA). Lawrence Berkeley Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7223309
- Report Number(s):
- LBL-4557; CONF-760572-1
- Country of Publication:
- United States
- Language:
- English
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