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and microstructure of twin and twinning mechanism (dislocation mechanism and shuffling mechanism) were summarized and discussed. As for the controversy between the dislocation mechanism and the shuffling mechanism, it is necessary to enrich the experimental results and atomic-computer simulation. Further exploring twinning growth mechanism is a theoretical foundation for utilizing twins......
the Basinski mechanism. Secondly, they accommodate strain along the c-axis, which gives rise to a decrease in the work hardening rate. Furthermore, the lattice rotation introduced by twinning can enhance... Twinning in weld HAZ of ZK21 commercial magnesium alloy LIU Jun-wei(刘俊伟), CHEN Ding(陈 鼎), CHEN Zhen-hua(陈振华) College of Materials Science and Engineering, Hunan University, Changsha 410082, China......
and then dwelling in a silica gel desiccator at ambient temperature for nearly two years. The present study was undertaken to elucidate the mechanism of twinning in cryomilling and the microstructural evolvement... and recrystallization, respectively. Fig.4 DSC curve for Al-Zn-Mg-Cu alloy powders cryomilled for 10 h 4 Discussion 4.1 Deformation twinning mechanism during cryomilling Deformation twinning can......
in recent years [1-3]. Twinning is an important deformation mechanism during hot deformation. A lot of attention has recently been paid to the effect of twinning on flow behavior [4-6] and correlation...], and PROUST et al [8] suggested that twinning could result in a flow hardening behavior and enhance the peak stress due to its grain refinement effect and Hall-Petch mechanism. All of the previous work......
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; twinning variant; deformation mechanism 镁合金是实际工程应用中最轻的金属结构材料, 在交通,电子通信,航空航天和国防军工等各个领域的应用日益广泛.但是,由于具有特殊的密排六方结构,镁合金的独立滑移系统非常有限,导致其室温条件下极差的成形性[1-6].对于形变镁合金中常见的几种孪生类型来说,孪生被认为是更易被激活,协调变形能力更强的变形机制.孪生具有极性特征,即只能...主要的变形机制. 关键词:镁合金；动态塑性变形；孪生变体；变形机制 中图分类号:TG146.2 文献标志码:A Twinning characteristic of AZ31 magnesium alloy during dynamic......
of the sample that has been loaded at 308 K under 28 MPa for more than 200 h. The crystal grain contains large twin, which indicates that twinning is one of the creep mechanism in magnesium alloys... on {} crystal planes in HCP structure maganism. The deformation that caused by twinning is too small, compared with dislocation slipping, so it is only the secondary mechanism to the creep at ambient......
to the specific mechanism associated with the twinning. In fact, the most commonly observed DRX mechanisms in Mg alloy are twinning-induced DRX and continuous DRX. Continuous DRX which is characterized by direct transformation of subgrains into high angle grains is believed to be the predominant mechanism for the nucleation of new grains in Mg alloys. For twinning-induced DRX, basal dislocations......
志码:A Compression mechanism of AZ31B Mg alloy at low temperature LI Shu-mei, WANG Ming-pu, ZHANG Zhen, LI Zhou, TANG Ning, LEI Qian (School of Materials Science and Engineering, Central South... in the twinning band and twins-intersections, which implies that the main places where DRX nuclei form are in twin boundaries and twins-intersection zones. Key words: AZ31B Mg alloy; twinning, twins......
="ChDivSummary">Twinning and detwinning are the important deformation modes in magnesium alloys during cyclic loading at room temperature. To analyze these two deformation mechanism, cyclic compression–tension...Twinning and detwinning during compression–tension loading measured by quasi in situ electron backscatter diffraction tracing in Mg–3Al–Zn rolled sheetLi Zheng1,Shi-Hong Zhang1,Hong-Wu Song1,3,Guang......
