• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Fabrication of Mg/Mg composite with sleeve-core structure and its effect on room-temperature yield asymmetry via bimetal casting-co-extrusion
【24h】

Fabrication of Mg/Mg composite with sleeve-core structure and its effect on room-temperature yield asymmetry via bimetal casting-co-extrusion

机译：套筒-核结构的Mg / Mg复合材料的制备及其对双金属浇铸-共挤出的室温屈服不对称性的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A remarkable yield asymmetry at room temperature (RT), all the time, severely influenced the wide industrial applications of Mg alloys. Here, we report a novel approach entitled as bimetal casting-co-extrusion to reduce the yield asymmetry of Mg-3Al-1Zn (wt.%) alloy. The results show that when casting temperature is set as 760 degrees C, Mg-3Al-1Zn/Mg-1Y (AZ31/W1, wt.%) alloy with the sleeve-core structure can achieve a well metallurgical bonding. While casting temperature is below 760 degrees C, the contact surface of AZ31 and W1 billets takes place massive cracks, and even two alloys are unable to well connect. After co-extrusion, the interface zone of AZ31/W1 rod never has any cracks and holes. By TEM observation, the interface zone of similar to 1 mu m is composed of only alpha-Mg. With increasing the proportion of W1 core, the tensile and compressive elongation-to-failure values of AZ31/W1 rod apparently enhance, and the decrease in tensile strength and the consistence in compressive strength give rise to the improved yield asymmetry from 0.57 to 0.84 at RT. This is mainly attributed to the more activity of slip deformation in tension and the restriction of {10 (1) over bar2} extension twinning in compression. Therefore, this work offers an insightful opinion to improve the mechanical properties of Mg alloys, especially the yield asymmetry, by bimetal casting-co-extrusion method.
机译：一直以来，室温（RT）的非凡屈服不对称性严重影响了Mg合金的广泛工业应用。在这里，我们报告了一种新颖的方法，称为双金属铸造-共挤出，以减少Mg-3Al-1Zn（wt。％）合金的屈服不对称性。结果表明，当铸造温度设定为760摄氏度时，具有套筒芯结构的Mg-3Al-1Zn / Mg-1Y（AZ31 / W1，wt。％）合金可以实现良好的冶金结合。当铸造温度低于760摄氏度时，AZ31和W1钢坯的接触表面会产生大量裂纹，甚至两种合金也无法很好地连接。共挤压后，AZ31 / W1杆的界面区域永远不会有任何裂纹和孔眼。通过TEM观察，类似于1μm的界面区域仅由α-Mg组成。随着W1磁芯比例的增加，AZ31 / W1棒的拉伸断裂伸长率和压缩断裂伸长率值明显提高，抗拉强度的降低和抗压强度的一致性使屈服强度的不对称性从0.57提高到0.84。 RT。这主要归因于张力中滑动变形的更多活动以及压缩中{10（1）超过bar2}延伸孪生的限制。因此，这项工作为通过双金属铸造-共挤出法改善镁合金的机械性能，特别是屈服不对称性提供了深刻的见解。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号