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

Journal Article · 06 April 2015 · Philosophical Magazine Letters

DOI: https://doi.org/10.1080/09500839.2015.1022621 · OSTI ID:1246342

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

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

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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1246342
• Report Number(s): LA-UR--14-29016
• Journal Information: Philosophical Magazine Letters, Journal Name: Philosophical Magazine Letters Journal Issue: 4 Vol. 95; ISSN 0950-0839
• Publisher: Taylor & FrancisCopyright Statement
• Country of Publication: United States
• Language: English