Spatially resolved strain measurements in Mo-alloy micropillars by differential aperture x-ray microscopy

被引：24

作者：

Bei, H. ^{[1
]}

Barabash, R. I. ^{[1
,2
]}

Ice, G. E. ^{[1
]}

Liu, W. ^{[3
]}

Tischler, J. ^{[3
]}

George, E. P. ^{[1
,4
]}

机构：

[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[2] Univ Tennessee, Ctr Mat Proc, Knoxville, TN 37996 USA

[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[4] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 07期

关键词：

D O I：

10.1063/1.2975371

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Spatially resolved strain distributions in the NiAl matrix and the similar to 550-1000 nm Mo fibers of a NiAl-Mo eutectic were investigated by microbeam x-ray diffraction. Position sensitive d-spacings for the individual phases were obtained from spatially resolved and energy-resolved Laue patterns. For embedded Mo fibers, the measured elastic strain is consistent with the predicted thermal mismatch strain between the NiAl and Mo phases. However, when the NiAl matrix is etched back to expose Mo micropillars, the d-spacing increases to that of unconstrained Mo, indicating release of the compressive residual strain in the Mo fibers. (c) 2008 American Institute of Physics.

引用

页数：3

共 13 条

[1] Thermal-expansion behavior of a directionally solidified NiAl-Mo composite investigated by neutron diffraction and dilatometry [J].

Bei, H ;

George, EP ;

Brown, DW ;

Pharr, GM ;

Choo, H ;

Porter, WD ;

Bourke, MAM .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (12)

[2] Small-scale mechanical behavior of intermetallics and their composites [J].

Bei, H. ;

George, E. P. ;

Pharr, G. M. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 483-84 (1-2 C) :218-222

[3] Compressive strengths of molybdenum alloy micro-pillars prepared using a new technique [J].

Bei, H. ;

Shim, S. ;

George, E. P. ;

Miller, M. K. ;

Herbert, E. G. ;

Pharr, G. M. .

SCRIPTA MATERIALIA, 2007, 57 (05) :397-400

[4] Microstructures and mechanical properties of a directionally solidified NiAl-Mo eutectic alloy [J].

Bei, H ;

George, EP .

ACTA MATERIALIA, 2005, 53 (01) :69-77

[5] Automated indexing for texture and strain measurement with broad-bandpass x-ray microbeams [J].

Chung, JS ;

Ice, GE .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (09) :5249-5255

[6]

Ice GE, 2007, DISCLOC SOLIDS, V13, P499, DOI 10.1016/S1572-4859(07)80011-8

[7] Three-dimensional X-ray structural microscopy with submicrometre resolution [J].

Larson, BC ;

Yang, W ;

Ice, GE ;

Budai, JD ;

Tischler, JZ .

NATURE, 2002, 415 (6874) :887-890

[8] Time-resolved laue diffraction of deforming micropillars [J].

Maass, Robert ;

Van Petegem, Steven ;

Van Swygenhoven, Helena ;

Derlet, Peter M. ;

Volkert, Cynthia A. ;

Grolimund, Daniel .

PHYSICAL REVIEW LETTERS, 2007, 99 (14)

[9]

Misra A, 1998, PHILOS MAG A, V78, P533, DOI 10.1080/01418619808241921

[10] Microstructures and mechanical properties of directionally solidified NiAl-Mo and NiAl-Mo(Re) eutectic alloys [J].

Misra, A ;

Wu, ZL ;

Kush, MT ;

Gibala, R .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 240 :75-87

← 1 2 →