Phase-transformation and subgrain-deformation characteristics in a cobalt-based superalloy

被引：6
|
作者：
Benson, M. L. [1 ]
Reetz, B. [2 ]
Liaw, P. K. [1 ]
Reimers, W. [2 ]
Choo, H. [1 ,3 ]
Brown, D. W. [4 ]
Saleh, T. A. [4 ]
Klarstrom, D. L. [5 ]
机构：
[1] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
[2] Tech Univ Berlin, Inst Mat Sci & Technol, D-10587 Berlin, Germany
[3] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
[4] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
[5] Haynes Int Inc, Kokomo, IN 46904 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 4-5期
基金：
美国国家科学基金会;
关键词：
Strain-induced phase transformation; In situ neutron diffraction; Line-profile analysis; Stacking faults; CYCLE FATIGUE BEHAVIOR; NEUTRON-DIFFRACTION; IN-SITU; TEMPERATURE EVOLUTION; STRAIN; FCC; DIFFRACTOMETER; ALLOY;
D O I：
10.1016/j.msea.2010.10.061
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A complimentary set of experiments, in situ neutron diffraction and ex situ synchrotron X-ray diffraction, were used to study the phase-transformation and subgrain-deformation characteristics of a cobalt-based superalloy. The neutron diffraction indicated a strain-induced phase transformation in the cobalt-based superalloy under uniaxial tension and compression. The synchrotron X-ray diffraction revealed stacking-fault accumulation and twinning under the same loading conditions. The extent of transformation was found to be greater under tension than under compression. Tensile plastic strains below 2% were accommodated by the stacking-fault creation, while those greater than 2% were accommodated by the phase transformation. Twinning was found to be more active under compressive loading than under tensile loading. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1987 / 1993
页数：7
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