The thermodynamic properties of the Zr-H 2 and Zr-Nb-H 2 systems
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1. R.L. Whiteley:Trans. ASM, 1960, vol. 52, p. 154. 2. D. H. Lloyd: Sheet Metal btd., 1962, voL 39, p, 82. 3. D. V. Witson and R. D. Butler: J. Inst. Metals, 1963, vol. 90, p. 473. 4. L. Lilet and M. Wybo:Sheet Metal lnd., 1964 vol. 41, p. 783. 5. M. Atkinsonand I. M, Maclean:Sheet Metal tnd., 1965, voL 42, p. 290. 6. M. A. Atkinson:SheetMetal Ind., i 967, vol. 44, p. 167, alsoJr-Iron Steel Inst., 1970, vol. 208, p. 58. 7. R. Grimesand J. C. Wright:Sheet Metal hzd., 1967, vol. 44, p. 391. 8. J. M. Thorp: Sheet Metal lnd., 1973, vol. 50, p. 99. 9. R. E. Schmidtand A, Lawley:Met. Eng. Q., 1973, vol. 13, p. 1. 10. AmericanDeep DrawingResearchGroup: Met. Eng. Q., 1974, voL 14, p. 50, 11. A. G. Riggs:SheetMetallnd., 1973, vol. 50, p. 620. 12. W. F. Hosfordand W. A. Backofen: in Fundamentals o/Deformation Processing, W. A. Backofenet al, eds., pp. 25%98, SyracuseUniversity Press, N.Y,, 1964. 13. R. Hill: Proc. Roy. Soc., Set. A, vol. 193, p. 281 ; and Mathematical Theory of Plasticity, chapt. XII, pp. 3 ] 5-40, Oxford UniversityPress, 1950. 14. D. C. Chiangand S. Kobayashi:J. Eng. ind., 1966,vol. 88, p. 443. 15. B. Budiansky and N. M. Wang: J. Mech. Phys. Solids, 1966, vol. 14, p. 357. 16. W. F, Hosford:Proc. of the 3rd lnml. Conf. on the Strength of'Metals and Alloys, vol. 2, p. 137, Cambridge,England, 1973. 17. W. F. Hosford: in Proceedings of the 21st Sagamore Army Materials Research Conference, August 1974, to be published. 18. J. Ahhoff, K. Drefahl,and P. Wincierz:Z. Metatlk., 1971, vol. 62, p. 765. 19. H. R. Piehlerand W. A. Backofen: in Textures in Research and Practice, J. Grewen and G. Wassermann,eds., p. 436, Springer-Veriag,BerLin, 1969. 20. R. L. Whiteleyand D. E. Wise:Flat Rolled Products llI, p. 47, lnterscience Publishers,New York, 1962,
atom fraction of zirconium (XZr) 0.9 0.8 02 0.6
0~10 [
""-o~
~ ! E ~_ .~ -5.0 ~ -6.0
/
,o | ~" o~.~ -7.0k
472-VOLUME 7A,MARCH 1976
-30
t
j
I r -50
///
~,,
....60 , j
/
// '~ -8.0 I, t~ -9"0r' 0.0
-7.0 -
t
1
I _ _
I
0.1 0.2 0.3 0.4 atom fraction of hydrogen (X H)
0.5
Fig. 1 - - F r e e e n e r g y against atom fraction of hydrogen plot in the fl-phase of Z r - H 2 s y s t e m at 800~ ~, (GH-89 __{GZr-G~r); 9 AGm. The a r r o w indicates the d i r e c t i o n in which an i s o t h e r m a l curve shifts with i n c r e a s e in t e m perature.
2.0-
atom fraction of zirconium(Xzr) 0.9 0.8 0.7 0,6 1 T-f .... f
E
t~
-2 .t
-
-4.(
-
-6,t
--
0.5 -tZO 0.0
0.0 "-~-
SINHA
VIJAY KUMAR SINHA is Senior Assistant Training Officer, Department of Materials Science, National Institute of Foundry and Forge Technology, Ranchi 834003, Bihar State, INDIA. Manuscript submitted September 9, 1975.
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The Thermodynamic Properties of the Zr-Htand Zr-Nb-H 2 Systems
The z i r c o n i u m and z i r c o n i u m - n i o b i u m a l l o y s a r e indispensable materials for nuclear power reactor a n d o t h e r i n d u s t r i a l a p p l i c a t i o n s b e c a u s e of t h e i r e x c e l l e n t p h y s i c o c h e m i c a l a n d t e c h n o l o g i c a l p
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