Crystallography of lath martensite and stabilization of retained austenite
TEM was used to study the morphology and crystallography of lath martensite in low and medium carbon steels in the as-quenched and 200/sup 0/C tempered conditions. The steels have microduplex structures of dislocated lath martensite and continuous thin films of retained austenite at the lath interfaces. Stacks of laths form the packets which are derived from different (111) variants of the same austenite grain. The residual parent austenite enables microdiffraction experiments with small electron beam spot sizes for the orientation relationships (OR) between austenite and martensite. All three most commonly observed ORs, namely Kurdjumov-Sachs, Nishiyama-Wassermann, and Greninger-Troiano, operate within the same sample.
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- Resource Type:
- Technical Report
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- Other Information: Thesis. Portions of document are illegible
- Research Org:
- Lawrence Berkeley Lab., CA (USA)
- Country of Publication:
- United States
- 36 MATERIALS SCIENCE; CARBON STEELS; CRYSTALLOGRAPHY; MICROSTRUCTURE; AUSTENITE; ELECTRON DIFFRACTION; HEAT TREATMENTS; LATTICE PARAMETERS; MARTENSITE; MORPHOLOGY; TRANSMISSION ELECTRON MICROSCOPY; ALLOYS; CARBON ADDITIONS; COHERENT SCATTERING; CRYSTAL STRUCTURE; DIFFRACTION; ELECTRON MICROSCOPY; IRON ALLOYS; IRON BASE ALLOYS; MICROSCOPY; SCATTERING; STEELS 360102* -- Metals & Alloys-- Structure & Phase Studies
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