Crystallographic considerations of the delta in equilibrium. cap alpha. displacive transformation in plutonium alloys
Determination of invariant-plane strain crystallographic solutions for martensitic transformation between the FCC delta and monoclinic ..cap alpha.. phases in plutonium alloys, using three possible lattice correspondences and 53 possible lattice-invariant shear systems, identifies the most probable delta-..cap alpha.. lattice correspondence. The operative lattice-invariant shear systems are predicted by comparison of both shape strain magnitudes and computed interfacial energies. For delta ..-->.. ..cap alpha.. transformation twinning on (001) (100)/sub ..cap alpha../ is favored, giving a (.817, .538, .208)/sub delta/ habit and a (.947, .269, .174)/sub delta/ shape strain of magnitude m/sub 1/ = .324. The ..cap alpha.. ..-->.. delta transformation favors slip on (111) (101)/sub delta/, giving a (.255, .844, .471)/sub ..cap alpha../ habit and (.822, .466, .355)/sub ..cap alpha../ shape strain of magnitude m/sub 1/ = .417.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA); Massachusetts Inst. of Tech., Cambridge (USA). Dept. of Materials Science and Engineering
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6718419
- Report Number(s):
- UCRL-93392; CONF-860879-5; ON: DE87005054
- Resource Relation:
- Conference: International conference on martensitic transformations (ICOMAT-86), Nara, Japan, 26 Aug 1986; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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