文章摘要
等径道角 挤压工艺对铸态 AZ91D 镁合金组织的影响
Effect of Equal Channel Angular Extrusion Process on the Microstructure of AZ91D Magnesium Alloy
Received:June 16, 2014  Revised:September 01, 2014
DOI：10. 3969 /j. issn. 1674-6457. 2014. 05. 011
中文关键词: 等径道角 挤压  AZ91D  微观组织  工艺参数
英文关键词: equal channel angular extrusion  AZ91D  microstructure  process parameters
基金项目:
Author NameAffiliation
FU Yun Southwest Technique and Engineering Institute, Chongqing 400039, China 
LU Mei-qi Southwest Technique and Engineering Institute, Chongqing 400039, China 
CHEN Yi-ting Chongqing Dajiang Industry Co. , Ltd. , Chongqing 401321, China 
XIANG Yun-liang Southwest Technique and Engineering Institute, Chongqing 400039, China 
ZHAO Zu-de Southwest Technique and Engineering Institute, Chongqing 400039, China 
NING Hai-qing Southwest Technique and Engineering Institute, Chongqing 400039, China 
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中文摘要:
      目 的 介绍等径道角 挤压的 原理及其对铸态 AZ91D 镁合金的 组织产生的 作用 。 方法 通过确定的试验工艺参数, 对 AZ91D 镁合金进行了 等径道角 挤压变形试验。 使用 金相显微镜和扫描电镜( SEM) , 对变形前后的 材料进行了 显微组织的 ?臁?结果 通过进行 ECAE 挤压后, AZ91D镁合金中的黑色共晶相( Mg17Al12) 产生了 回溶, 在机械剪切和动态再结晶 的综合作用 下, 晶 粒得到了 细化。 结论 通过等径道角 挤压, 能明显改善铸态 AZ91D 镁合金的组织。
英文摘要:
      Objective To introduce the principle of equal channel angular extrusion( ECAE) and analyze its effect on the microstructure of AZ91D magnesium alloy. Methods The ECAE experiment of AZ91D magnesium alloy was conducted using the designated process parameters. The microstructure of AZ91D magnesium alloy before and after equal channel angular extrusion was investigated by means of optical metalloscopy and scanning electron microscope equipment. Results The results showed that the black eutectic phase ( Mg17Al12) began to remelt after ECAE treatment, and the crystals were refined under the comprehensive effects of mechanical shear and dynamic recrystallization. Conclusion The microstructure of AZ91D magnesium alloy was obviously improved by ECAE.
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