Low cycle fatigue behaviour of modified and conventional superalloy Inconel 718 at 650°C
Tóm tắt
The present investigation deals with the study and comparison of low cycle fatigue (LCF) behavior of modified IN 718 alloy with higher Al+Ti/Nb and Al/Ti ratios of 0.458 and 0.870, with that of conventional IN 718 alloy with corresponding ratios of 0.294 and 0.50 respectively. LCF tests were carried out in total strain control mode at total strain amplitudes (Δɛt/2) from ±0.625% to ±1.0%, in fully reversed loading (R= −1) at 650°C. The modified alloy was found to exhibit better LCF resistance than the conventional alloy.
Tài liệu tham khảo
Gell M, Leverant G R and Wells C. H, ASTM STP 464 (1970) 113.
Andrews R G, Koul A K and Au P, Editor Loria E A, Superalloys 718, 625, 706 and various derivatives, (Warrendale, PA: The Minerals, Metals and Materials Society, 1991) 943.
Cozar R and Pineau A, Metallurgical Transactions, 4 (1973) 47.
Fournier D and Pineau A, Metallurgical Transactions, 8A (1977) 1095.
Dong J X, Xie X S and Zhang S H, Scripta Materialia, 28 (1993) 1477.
ASTM E-606, Annual Book of ASTM Standards, American Society of Testing and Materials, Philadelphia, PA, 3.01 (2004) 62.
Praveen K V U, Ph.D. Thesis, Banaras Hindu University, Varanasi. (2006).
Smith R W, Hirschberg M H, Manson S S, 1963, NASA TND-1574.
Manson S S, NACA Tech. Note, (1954) 2933.
Stubbington C A, Acta Metal., 12 (1964) 931.
Wilhelm M, Material Science Engineering A, 48 (1981) 91.
Steiner D, Beddoe R, Gerold V, Kortorz G and Schemlezer R, Scripta Materialia, 17 (1983) 733.
Stoltz R E and Pineau A, Material Science Engineering, 34 (1978) 275.
Lerch B and Gerold V, Acta. Metal, 33 (1985) 1709.
Sundaraman M, Chen W, Singh V and Wahi R P, Acta Metal., 38 (1990) 1813.
Stubbington C A and Forsyth P J, Acta. Metal., 14 (1966) 5.
Calabrese C and Laird C, Material Science Engineering, 13 (1974) 141.
McQuillan A D and McQuillan M K, Titanium, Academic Press Inc., (1956) New York
Paton N E, Williams J C, Rauscher G P, 1973, Titanium science and Technology; eds., Jaffee R I and Burte H M, Plenum Press, New York, 2, 1049.
Lerch B A and Gerold V, Metallurgical Transactions, 18A (1987) 2135.