Investigation of deformation twinning under complex stress states in a rolled magnesium alloy

Wei Wu; Chih Pin Chuang; Dongxiao Qiao; Yang Ren; Ke An

doi:10.1016/j.jallcom.2016.05.144

Investigation of deformation twinning under complex stress states in a rolled magnesium alloy

Wei Wu, Chih Pin Chuang, Dongxiao Qiao, Yang Ren, Ke An

Materials Engineering

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

28 Scopus citations

Abstract

A specially designed semi-circular notch specimen was employed in the current study to generate the various strain conditions, including uniaxial, biaxial, shear, and plane strains, which was utilized to explore the evolution of different deformation twinning systems under complex loading conditions. Using in situ synchrotron X-ray diffraction mapping method, it was found that the extensive double twins were activated during loading, while nearly no extension twinning activity was detected. After the formation of {10.1} and {10.3} compression twins, they transformed into {10.1}-{10.2} and {10.3}-{10.2} double twins instantaneously at the early stage of deformation. The lattice strain evolutions in different hkls were mapped at selected load levels during the loading-unloading sequence. The relationship between the macroscopic straining and microscopic response was established.

Original language	English
Pages (from-to)	619-633
Number of pages	15
Journal	Journal of Alloys and Compounds
Volume	683
DOIs	https://doi.org/10.1016/j.jallcom.2016.05.144
State	Published - 2016

Funding

This research used resources at the Spallation Neutron Source (SNS), Oak Ridge National Laboratory (ORNL), supported by the U.S. Department of Energy , Basic Energy Sciences , Scientific User Facilities Division under Contract No. DE-AC05-00OR22725. W.W. is supported by a Laboratory Directed Research and Development (LDRD) project (LDRD-6789) of ORNL. The synchrotron X-ray diffraction work was carried out the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357 .

Funders	Funder number
Basic Energy Sciences , Scientific User Facilities Division
DOE Office of Science
U.S. Department of Energy
Office of Science
Argonne National Laboratory
Oak Ridge National Laboratory
Laboratory Directed Research and Development	LDRD-6789

Keywords

Mechanical properties
Metals and alloys
Microstructure
X-ray diffraction

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10.1016/j.jallcom.2016.05.144

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title = "Investigation of deformation twinning under complex stress states in a rolled magnesium alloy",

abstract = "A specially designed semi-circular notch specimen was employed in the current study to generate the various strain conditions, including uniaxial, biaxial, shear, and plane strains, which was utilized to explore the evolution of different deformation twinning systems under complex loading conditions. Using in situ synchrotron X-ray diffraction mapping method, it was found that the extensive double twins were activated during loading, while nearly no extension twinning activity was detected. After the formation of {10.1} and {10.3} compression twins, they transformed into {10.1}-{10.2} and {10.3}-{10.2} double twins instantaneously at the early stage of deformation. The lattice strain evolutions in different hkls were mapped at selected load levels during the loading-unloading sequence. The relationship between the macroscopic straining and microscopic response was established.",

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author = "Wei Wu and Chuang, {Chih Pin} and Dongxiao Qiao and Yang Ren and Ke An",

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T1 - Investigation of deformation twinning under complex stress states in a rolled magnesium alloy

AU - Wu, Wei

AU - Chuang, Chih Pin

AU - Qiao, Dongxiao

AU - Ren, Yang

AU - An, Ke

PY - 2016

Y1 - 2016

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AB - A specially designed semi-circular notch specimen was employed in the current study to generate the various strain conditions, including uniaxial, biaxial, shear, and plane strains, which was utilized to explore the evolution of different deformation twinning systems under complex loading conditions. Using in situ synchrotron X-ray diffraction mapping method, it was found that the extensive double twins were activated during loading, while nearly no extension twinning activity was detected. After the formation of {10.1} and {10.3} compression twins, they transformed into {10.1}-{10.2} and {10.3}-{10.2} double twins instantaneously at the early stage of deformation. The lattice strain evolutions in different hkls were mapped at selected load levels during the loading-unloading sequence. The relationship between the macroscopic straining and microscopic response was established.

KW - Mechanical properties

KW - Metals and alloys

KW - Microstructure

KW - X-ray diffraction

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VL - 683

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EP - 633

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Investigation of deformation twinning under complex stress states in a rolled magnesium alloy

Abstract

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Keywords

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