Microstructure and properties of dual-phase steels containing fine precipitates
Very fine particles (carbides or carbonitrides) of the order of 20 A were extensively examined in the ferrite regions of dual-phase steels subjected to intercritical annealing followed by fast quenching to room temperature. These particles are probably formed during quenching after intercritical annealing. The driving force for the precipitation reaction may arise from the supersaturation of carbon (or nitrogen) in the ferrite phase. These precipitates in certain alloy compositions cause a deviation from the generally observed two phase mixture rule in that the strength of the dual-phase steels having a higher volume fraction of martensite is lower than that having a lower volume fraction of martensite. Thus, the influence of such precipitates must be considered in the structure-property relations of dual-phase steels when fast quenching is employed after intercritical annealing.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Exxon Research and Engineering Co., Linden, NJ (USA). Corporate Research Science Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6129643
- Report Number(s):
- LBL-12177; ON: DE81029946
- Country of Publication:
- United States
- Language:
- English
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