Microstructure formation and solute partitioning during intercritical annealing of dual phase steels. [Fe-1. 5%Mn-0. 1%C, Fe-2%Si-0. 1%C, and Fe-1%Al-0. 1%C]

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5368623

Ohmura, M; Thomas, G ^[1]

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1. Univ. of California, Berkeley (USA)

Microstructure formation and solute partitioning depend on prior microstructure, intercritical annealing conditions, and alloy composition. In this research the following alloys: Fe-1.5%Mn-0.1%C, Fe-2%Si-0.1%C, and Fe-1%A1-0.1%C were studied. The starting condition was as quenched lath martensite from which annealing in the ferrite+austenite region was followed by water quenching. The concentration of substitutional elements in both ferrite and martensite were measured as a function of annealing times and temperatures by using microanalysis STEM-EDX methods. The results indicate that austenite growth and microstructure formation were more controlled by substitutional element in the case of Mn steel than that of Si steel. Microstructure formation mechanism and effect of alloy elements on solute partitioning are discussed.

• OSTI ID: 5368623
• Report Number(s): CONF-840909-; CODEN: TMPSA
• Journal Information: TMS (The Metallurgical Society) Paper Selection; (USA), Vol. 56; Conference: TMS-AIME fall meeting, Detroit, MI (USA), 16-20 Sep 1984; ISSN 0197-1689
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
CRYSTAL GROWTH
FERRITE
IRON BASE ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
MARTENSITE
ALUMINIUM ALLOYS
ANNEALING
CARBON ADDITIONS
MANGANESE ALLOYS
MICROSTRUCTURE
QUENCHING
SCANNING ELECTRON MICROSCOPY
SILICON ALLOYS
STEELS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY SPECTROSCOPY
ALLOYS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
HEAT TREATMENTS
IRON ALLOYS
MICROSCOPY
PHASE TRANSFORMATIONS
SPECTROSCOPY
360102* - Metals & Alloys- Structure & Phase Studies