Grain orientation dependence of lattice strains and intergranular damage rates in polycrystals under cyclic loading

L. L. Zheng; Y. F. Gao; Y. D. Wang; A. D. Stoica; K. An; X. L. Wang

doi:10.1016/j.scriptamat.2012.10.033

Grain orientation dependence of lattice strains and intergranular damage rates in polycrystals under cyclic loading

L. L. Zheng, Y. F. Gao, Y. D. Wang, A. D. Stoica, K. An, X. L. Wang

Materials Engineering

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Neutron diffraction experiments show that lattice strains in polycrystals under cyclic loading critically depend on the crystallographic orientations of diffracted grains, which can be explained by our crystal plasticity simulations and a micromechanical analysis based on slip anisotropy and the Taylor model. Experiments also show that the residual lattice strains gradually vanish with increasing number of fully reversed loading cycles. The corresponding decay rate correlates quantitatively with the grain-orientation-dependent total cumulative slip strain and qualitatively with grain boundary damage processes.

Original language	English
Pages (from-to)	265-268
Number of pages	4
Journal	Scripta Materialia
Volume	68
Issue number	5
DOIs	https://doi.org/10.1016/j.scriptamat.2012.10.033
State	Published - Mar 2013

Funding

This work was supported by the US National Science Foundation CMMI 0800168 and a graduate fellowship from the Joint Institute for Neutron Sciences at the University of Tennessee (LLZ and YFG), the National Natural Science Foundation of China (NSFC) under contract No. 51231002 (YDW) and the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy, at Oak Ridge National Laboratory (ADS and KA).

Funders	Funder number
Joint Institute for Neutron Sciences
Scientific User Facilities Division
National Science Foundation	CMMI 0800168
U.S. Department of Energy
Basic Energy Sciences
Oak Ridge National Laboratory
University of Tennessee
National Natural Science Foundation of China	51231002

Keywords

Cyclic loading
Lattice strain
Neutron diffraction
Taylor analysis

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10.1016/j.scriptamat.2012.10.033

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abstract = "Neutron diffraction experiments show that lattice strains in polycrystals under cyclic loading critically depend on the crystallographic orientations of diffracted grains, which can be explained by our crystal plasticity simulations and a micromechanical analysis based on slip anisotropy and the Taylor model. Experiments also show that the residual lattice strains gradually vanish with increasing number of fully reversed loading cycles. The corresponding decay rate correlates quantitatively with the grain-orientation-dependent total cumulative slip strain and qualitatively with grain boundary damage processes.",

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AU - Zheng, L. L.

AU - Gao, Y. F.

AU - Wang, Y. D.

AU - Stoica, A. D.

AU - An, K.

AU - Wang, X. L.

PY - 2013/3

Y1 - 2013/3

N2 - Neutron diffraction experiments show that lattice strains in polycrystals under cyclic loading critically depend on the crystallographic orientations of diffracted grains, which can be explained by our crystal plasticity simulations and a micromechanical analysis based on slip anisotropy and the Taylor model. Experiments also show that the residual lattice strains gradually vanish with increasing number of fully reversed loading cycles. The corresponding decay rate correlates quantitatively with the grain-orientation-dependent total cumulative slip strain and qualitatively with grain boundary damage processes.

AB - Neutron diffraction experiments show that lattice strains in polycrystals under cyclic loading critically depend on the crystallographic orientations of diffracted grains, which can be explained by our crystal plasticity simulations and a micromechanical analysis based on slip anisotropy and the Taylor model. Experiments also show that the residual lattice strains gradually vanish with increasing number of fully reversed loading cycles. The corresponding decay rate correlates quantitatively with the grain-orientation-dependent total cumulative slip strain and qualitatively with grain boundary damage processes.

KW - Cyclic loading

KW - Lattice strain

KW - Neutron diffraction

KW - Taylor analysis

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EP - 268

JO - Scripta Materialia

JF - Scripta Materialia

IS - 5

ER -

Grain orientation dependence of lattice strains and intergranular damage rates in polycrystals under cyclic loading

Abstract

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Keywords

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