Microstructure and mechanical properties of the superalloy ATI Allvac® 718Plus™

被引：40
|
作者：
Zickler, Gerald A. [1 ]
Schnitzer, Ronald [1 ]
Radis, Rene [2 ,3 ]
Hochfellner, Rainer [1 ]
Schweins, Ralf [4 ]
Stockinger, Martin [5 ]
Leitner, Harald [1 ]
机构：
[1] Univ Leoben, Dept Phys Met & Mat Testing, Christian Doppler Lab Early Stages Precipitat, A-8700 Leoben, Austria
[2] Vienna Univ Technol, Inst Mat Sci & Technol, Christian Doppler Lab Early Stages Precipitat, A-1040 Vienna, Austria
[3] Graz Univ Technol, Inst Mat Sci & Welding, A-8010 Graz, Austria
[4] Inst Max Von Laue Paul Langevin, DS LSS Grp, F-38042 Grenoble, France
[5] Bohler Schmiedetech GmbH & Co KG, A-8605 Kapfenberg, Austria
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 523卷 / 1-2期
关键词：
Nickel-based superalloy; Precipitation kinetics; Atom probe tomography; Small-angle neutron scattering; Strengthening mechanism; ANGLE NEUTRON-SCATTERING; NI-AL ALLOYS; ATOM-PROBE TOMOGRAPHY; BASE SUPERALLOY; ELECTRON-MICROSCOPY; PHASE-SEPARATION; DELTA-PHASE; COARSENING KINETICS; GAMMA' PRECIPITATE; INCONEL-718; ALLOY;
D O I：
10.1016/j.msea.2009.06.014
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
ATI Allvac (R) 718Plus (TM) is a novel nickel-based superalloy, which was designed for heavy-duty applications in aerospace turbines. In the present study the high-resolution investigation techniques, atom probe tomography, electron microscopy and in situ high-temperature small-angle neutron scattering were used for a comprehensive microstructural characterization. The alloy contains nanometer-sized spherical gamma' phase precipitates (Ni(3)(Al,Ti)) and plate-shaped delta phase precipitates (Ni(3)Nb) of micrometer size. The precipitation kinetics of the gamma' phase can be described by a classical model for coarsening. The precipitation strongly influences the mechanical properties and is of high scientific and technological interest. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：295 / 303
页数：9
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