Metastable phases in liquid-quenched alloys of chromium and manganese with antimony
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Metastable Phases in Liquid-Quenched Alloys of Chromium and Manganese with Antimony J. D. SPEIGHT
Fig. 4 - T h e t e m p e r a t u r e dependence of the t r a n s i t i o n s t r a i n e t ir~ c o m m e r c i a l purity titanium. hand, deformation twinning at the lower temperatures i n c o m m e r c i a l p u r i t y t i t a n i u m 19 i s e x p e c t e d to p r e vent or retard the cell formation and consequently i n h i b i t the" f o r m a t i o n of a s e c o n d s t a g e of h a r d e n i n g . H o w e v e r , i n i o d i d e t i t a n i u m a t 77 K t h e v o l u m e f r a c t i o n of t w i n s i n c r e a s e s f a s t e r w i t h s t r a i n to a b o u t 25 p c t strain and then remains nearly constant. The change in work-hardening behavior provoking a second stage i n i o d i d e t i t a n i u m a t 77 K m a y p o s s i b l y b e a s s o c i a t e d w i t h t h i s c h a n g e in t w i n n i n g c h a r a c t e r i s t i c s . T w o of u s (S. N. M o n t e i r o a n d R . E . R e e d - H i l l ) , a r e i n d e b t e d to t h e U n i t e d S t a t e s A r m y R e s e a r c h O f f i c e , Durham for the financial support under Grant Number DA -ARO-D -31-124 -71 -G46. 1 A.T. Santhanam and R E. Reed-Hill: ScriptaMet., 1970, vol. 4, pp. 529-32. 2. R. L. Smith, G. Spangler,and-R. M. Brick. Trans. ASM, 1954, vol 46, pp. 97397. 3. W C. Leshe and R. J. Sober. Trans. ASM, 1967, vol. 60, pp. 99-111. 4 W. J. M. Tegart: Elements o]MechamcaIMetaUurgy, 1966, p. 17, The MacMdlian Co., New York. 5. C. Crussardand B. Jaoul: Rev. Met, 1950, vol. 8, pp. 589-600. 6. C. Crussard Rev Met, 1953, vol. 10, pp. 697-710. 7. B. Jaoul: J. Mech. Phys Solids, 1957, vol 5, pp. 95-114, 8. P. Ludwlk: Elemente der Technologischem. Mechanik, 1909, p. 32, Juhus Springer, Berhn 9. F. D. Rosl and F. C. Perkins: Trans. ASM, 1953, vol. 45, pp. 972-92. 10 N. G. Turner and W. T. Roberts: J. Less-Common Metals, 1968, vol. 19, pp 3744. 11. S. N. Montelro, A. T. Santhanam, and R. E. Reed-Hdl: The Science Technology and Application of T~tanium, 1970, pp. 503-16, PergamonPress, New York. 12. W. B. Mornson: Trans ASM, 1966, vol. 59, pp. 824-46. 13. B. W. Christ and G. V. Smith: Acta Met., 1967, vol 15, pp. 809-16 14. Y. Bergstromand B Aronsson:Met. Trans., 1970, vol l, pp. 1029-30. 15. S. Ramam and P. Rodrlguez: Proc. Syrup. on Mater. Sci. Research, Bangalore, 1970. 16. W. B. Momson: Met. Trans., 1971, vol. 2, p. 331. METALLURGICAL TRANSACTIONS
RECENT i n v e s t i g a t i o n s of l i q u i d q u e n c h e d b i s m u t h , antimony, and tellurium-rich alloys have led to the disc o v e r y of m a n y n e w i n t e r m e d i a t e p h a s e s . 1-4 A m o n g t h e m o r e i n t e r e s t i n g of t h e s e n e w p h a s e s a r e t h e o n e s a d o p t i n g t h e s i m p l e c u b i c ( a - P o t y p e ) s t r u c t u r e in l i q u i d q u e n c h e d a l l o y s of A u , P d , N i , x I n , 2 a n d lab 3 w i t h Sb, Au w i t h B i , ~ a n d A u a n d Ag w i t h T e . 4 I n a d d i t i o n , a l l o y s h a v i n g t h e r h o m b o h e d r a l (1
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