Ting Xia

Bio: Ting Xia is an academic researcher from Chongqing University. The author has contributed to research in topics: Electron backscatter diffraction & Crystal twinning. The author has an hindex of 4, co-authored 4 publications receiving 32 citations.

{101¯2}−{101¯2} double tensile twinning in a Mg-3Al-1Zn alloy sheet during cyclic deformation

Abstract: The typical fracture morphology of the Mg-3Al-1Zn alloy after cyclic deformation was investigated using optical microscopy (OM), and an electron back-scatter diffraction (EBSD). A novel finding of this study is that large number of stripe-like laminas were found within the primary { 10 1 ¯ 2 } tensile twins in the crack initiation and crack propagation regions. It is shown that these laminas primarily result from { 10 1 ¯ 2 } − { 10 1 ¯ 2 } twinning during cyclic deformation. According to the results and combined with theoretical analysis, the formation of { 10 1 ¯ 2 } − { 10 1 ¯ 2 } twins are largely contributing to the local strain accommodation caused by different twin variants.

Influence of {101¯2} twin characteristics on detwinning in Mg-3Al-1Zn alloy

Abstract: In the present work, the influence of pre-induced { 10 1 ¯ 2 } twin characteristics on detwinning activation in a basal texture magnesium alloy is systematically investigated by a combination of electron backscatter diffraction technique and mechanical tests. Samples containing pre-induced { 10 1 ¯ 2 } twin variants with different morphological characteristics are prepared by pre-strain path change tests comprised two pre-strain paths: (i) compression along the rolling direction of magnesium alloy plate; (ii) tension along the normal direction of magnesium alloy plate. In the former case, a single { 10 1 ¯ 2 } twin variant or a { 10 1 ¯ 2 } twin pair is formed in one grain. While, multiple { 10 1 ¯ 2 } twin variants are usually activated simultaneously in one grain in the latter case. During subsequent compression along normal direction, detwinning process is effectively retarded for the samples containing multiple { 10 1 ¯ 2 } twin variants in one grain. Meanwhile, the yield stress of corresponding samples is enhanced as well, compared to that of the samples containing a single { 10 1 ¯ 2 } twin variant or a { 10 1 ¯ 2 } twin pair in one grain. According to these experimental features, the possible reasons behind such phenomena are proposed and discussed.

Effect of temperature on microstructure and texture evolutions during uniaxial compression of commercially pure titanium

Abstract: Commercially pure (CP) titanium samples were subjected to uniaxial compression of 3%, 10%, 20%, 30%, 40% and 50% reductions at room temperature (298 K), 673 K and 873 K respectively. {10 1 ¯ 2} type tensile twins were observed during the deformation at temperatures of 298 K and 673 K only. Volume fraction of these twins was increased up to 20% reduction beyond which it was decreased on further increasing the % reduction. The non-basal orientations had higher Taylor factor values and were prone to twinning. On the other hand near-basal orientations were observed to be the possible twinning products. It was further observed that the volume fraction of dynamically recrystallized grains was increased with increase in % reductions at high temperatures. The initial non-basal texture of the samples was found to be transformed to dominant basal texture after deformation irrespective of the temperature of deformation. An abrupt transition of texture from non-basal to basal at a true strain of 0.22 of the samples deformed at a temperature of 873 K was observed and this may be attributed to the nucleation and growth of tensile twinning.