Tension-compression-tension tertiary twins in coarse-grained polycrystalline pure magnesium at room temperature

doi:10.1080/09500839.2015.1022621

Title: Tension-compression-tension tertiary twins in coarse-grained polycrystalline pure magnesium at room temperature

Full Record
Other Related Research

Abstract

Using electron backscatter diffraction, the microstructural features of tension–compression–tension (T–C–T) tertiary twins are studied in coarse-grained pure polycrystalline magnesium subjected to monotonic compression along the extrusion direction in ambient air. T–C–T tertiary twins are developed due to the formation of a compression–tension double twin inside a primary tension twin. All the observed T–C–T twin variants are of T_iC_jT_j type. T_iC_i+1T_i+1 (or T_iC_i–1T_i–1) variants are observed more frequently than T_iC_i+2T_i+2 (or T_iC_i–2T_i–2) variants. Moreover, the number of tertiary twin lamellae increases with the applied compressive strain.

Authors:

Yu, Qin ^[1]; Jiang, Yanyao ^[1]; Wang, Jian ^[2]

Univ. of Nevada, Reno, Reno, NV (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: 2015-04-07

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1246342

Report Number(s):: LA-UR-14-29016
Journal ID: ISSN 0950-0839

Grant/Contract Number:: 1126582; AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: Philosophical Magazine Letters

Additional Journal Information:: Journal Volume: 95; Journal Issue: 4; Journal ID: ISSN 0950-0839

Publisher:: Taylor & Francis

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; polycrystalline pure magnesium; tertiary twin

Citation Formats


                    Yu, Qin, Jiang, Yanyao, and Wang, Jian. Tension-compression-tension tertiary twins in coarse-grained polycrystalline pure magnesium at room temperature.  United States: N. p., 2015. 
        Web.  doi:10.1080/09500839.2015.1022621.

Copy to clipboard


                    Yu, Qin, Jiang, Yanyao, & Wang, Jian. Tension-compression-tension tertiary twins in coarse-grained polycrystalline pure magnesium at room temperature.  United States.  doi:10.1080/09500839.2015.1022621.

Copy to clipboard


                    Yu, Qin, Jiang, Yanyao, and Wang, Jian. Tue .  
        "Tension-compression-tension tertiary twins in coarse-grained polycrystalline pure magnesium at room temperature".  United States.  doi:10.1080/09500839.2015.1022621.  https://www.osti.gov/servlets/purl/1246342.

Copy to clipboard


                    
@article{osti_1246342,

  title        = {Tension-compression-tension tertiary twins in coarse-grained polycrystalline pure magnesium at room temperature},

  author       = {Yu, Qin and Jiang, Yanyao and Wang, Jian},

  abstractNote = {Using electron backscatter diffraction, the microstructural features of tension–compression–tension (T–C–T) tertiary twins are studied in coarse-grained pure polycrystalline magnesium subjected to monotonic compression along the extrusion direction in ambient air. T–C–T tertiary twins are developed due to the formation of a compression–tension double twin inside a primary tension twin. All the observed T–C–T twin variants are of TiCjTj type. TiCi+1Ti+1 (or TiCi–1Ti–1) variants are observed more frequently than TiCi+2Ti+2 (or TiCi–2Ti–2) variants. Moreover, the number of tertiary twin lamellae increases with the applied compressive strain.},

  doi          = {10.1080/09500839.2015.1022621},

  journal      = {Philosophical Magazine Letters},

  number       = 4,

  volume       = 95,

  place        = {United States},

  year         = {2015},

  month        = {4}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

DOI: 10.1080/09500839.2015.1022621

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 4 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Pre-compression effect on microstructure evolution of extruded pure polycrystalline magnesium during reversed tension load

Journal Article Culbertson, Duke ; Yu, Qin ; Wang, Jian ; ... - Materials Characterization

Highlights: • Number of twin variants under compression along ED is dependent on grain orientation. • Tension after pre-compression results in low-SF twinning and secondary twinning. • Secondary twinning is facilitated by increasing pre-compression. • Sub-grains due to twinning enhance material strength. - Abstract: The microstructure evolution of extruded pure polycrystalline magnesium under compression followed by subsequent tension in ambient air was investigated. Solid round dog-bone shaped specimens were compressed along the extrusion direction (ED) to − 7.3% and − 12.8% true strains, respectively, and then tensioned along the ED to failure. Electron backscatter diffraction (EBSD) was used to examinemore »« less
DOI: 10.1016/J.MATCHAR.2017.10.003
Twinning-detwinning behavior during cyclic deformation of magnesium alloy

Journal Article Lee, Soo Yeol ; Wang, Huamiao ; Gharghouri, Michael A. - Metals

In situ neutron diffraction has been used to examine the deformation mechanisms of a precipitation-hardened and extruded Mg-8.5wt.%Al alloy subjected to (i) compression followed by reverse tension (texture T1) and (ii) tension followed by reverse compression (texture T2). Two starting textures are used: (1) as-extruded texture, T1, in which the basal pole of most grains is normal to the extrusion axis and a small portion of grains are oriented with the basal pole parallel to the extrusion axis; (2) a reoriented texture, T2, in which the basal pole of most grains is parallel to the extrusion axis. For texture T1,more »« less
Cited by 6
DOI: 10.3390/met5020881

Full Text Available
Initiation and strain compatibility of connected extension twins in AZ31 magnesium alloy at high temperature

Journal Article Liu, Xiao ; State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, Hunan 410082 ; Zhu, Biwu ; ... - Materials Characterization

Uniaxial compression tests were carried out at 350 °C and a strain rate of 0.3 s{sup −1} on as-extruded AZ31 magnesium alloy samples. At a true strain of − 0.1, extension twin pairs in a grain and twin chains across adjacent grains were detected. The orientation of selected twins and their host grains were determined by electron backscattered diffraction (EBSD) techniques. The Schmid factors (SFs), accommodation strains and geometric compatibility factors (m{sup ′}) were calculated. Analysis of the data indicated that the formation of twin pair and twin chain was related to the SF and m{sup ′}. Regarding to twinmore »« less
DOI: 10.1016/J.MATCHAR.2016.11.003
Twinning behaviors of a rolled AZ31 magnesium alloy under multidirectional loading

Journal Article Hou, Dewen ; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044 ; Liu, Tianmo ; ... - Materials Characterization

The microstructure and texture evolution of an AZ31 magnesium rolled sheet during quasi-static compression at strain rates of 10{sup −3} s{sup −1} has been investigated by in situ electron backscattered diffraction. The influence of the initial and pre-deformed texture on the predominant deformation mechanisms during compression has been examined. It has been found that extensive grain reorientation due to (10 − 12) tensile twinning appeared when compressed along transverse direction. Tensile twin variants were observed under this loading condition, and different variants will cause an effect to the following deformation. Several twinning modes occurred with continuative loading along rolling direction.more »« less
DOI: 10.1016/J.MATCHAR.2016.11.046
Residual-stress-induced grain growth of twinned grains and its effect on formability of magnesium alloy sheet at room temperature

Journal Article Kim, Se-Jong ; Kim, Daeyong ; Lee, Keunho ; ... - Materials Characterization

A magnesium alloy sheet was subjected to in-plane compression along with a vertical load to avoid buckling during compression. Pre-compressed specimens machined from the sheet were annealed at different temperatures and the changes in microstructure and texture were observed using electron back scattered diffraction (EBSD). Twinned grains preferentially grew during annealing at 300 °C, so that a strong texture with the < 0001 > direction parallel to the transverse direction developed. EBSD analysis confirmed that the friction caused by the vertical load induced inhomogeneous distribution of residual stress, which acted as an additional driving force for preferential grain growth ofmore »« less
DOI: 10.1016/J.MATCHAR.2015.09.007

Similar Records