THERMAL STABILITY AND MECHANICAL PROPERTIES OF NANOSTRUCTURED NICKEL BASED ALLOY INCONEL 718

被引：0
|
作者：
Mukhtarov, S. K. [1 ]
Valitov, V. A. [1 ]
Dudova, N. R. [2 ]
机构：
[1] Russian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Russia
[2] Belgorod State Univ, Belgorod 308015, Russia
来源：
REVIEWS ON ADVANCED MATERIALS SCIENCE | 2010年 / 25卷 / 03期
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中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Thermal stability of nanostructured (NS) nickel based alloy Inconel 718 has been investigated This structure was formed by severe plastic deformation (SPD) via high pressure torsion (HPT) and multiple isothermal forging (MIF) of the alloy with an initial coarse-grained (CG) structure The produced microstructures were analyzed Such NS conditions are characterized by the nonequilibrium grain boundaries and a high hardness value that is twice larger than that of a CG alloy Tensile tests of NS alloy after MIF have shown very high room-temperature strength Thermal stability of the studied structural conditions of the alloy depends on the presence and stability of the precipitates of delta- and gamma ''-phases, each of which, in accordance with its quantity, sizes, coherence with matrix, prevents the grain growth
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页码：219 / 224
页数：6
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