Mg-4Zn-0.5Er-1Y镁合金板材的组织与力学性能

王忠军; 李志峰; 王亚男; 杨庆祥; 马鹏程; 蔡传博

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Mg-4Zn-0.5Er-1Y镁合金板材的组织与力学性能
Microstructure and Mechanical Properties of Mg-4Zn-0.5Er-1Y Magnesium Alloy Sheet
- 角色： First author 第一作者
- 机构：
  辽宁科技大学材料与冶金学院辽宁省材料成型与组织性能控制重点实验室
王忠军
1 ，
- 机构：
  辽宁科技大学材料与冶金学院辽宁省材料成型与组织性能控制重点实验室
李志峰
1 ，
- 机构：
  辽宁科技大学材料与冶金学院辽宁省材料成型与组织性能控制重点实验室
王亚男
1 ，
- 机构：
  燕山大学材料学院
杨庆祥
2 ，
- 机构：
  辽宁科技大学材料与冶金学院辽宁省材料成型与组织性能控制重点实验室
马鹏程
1 ，
- 机构：
  辽宁科技大学材料与冶金学院辽宁省材料成型与组织性能控制重点实验室
蔡传博
1
2010年30卷第12期页码：1086-1089
纸质出版日期： 2010 ，
DOI：

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引用
[1]王忠军,李志峰,王亚男,杨庆祥,马鹏程,蔡传博.Mg-4Zn-0.5Er-1Y镁合金板材的组织与力学性能[J].特种铸造及有色合金,2010,30(12):1086-1089+1071.

Wang ZhongJun1, Li Zhifeng1, Wang Yanan1, et al. Microstructure and Mechanical Properties of Mg-4Zn-0.5Er-1Y Magnesium Alloy Sheet[J]. Special Casting & Nonferrous Alloys, 2010,30(12):1086-1089.
[1]王忠军,李志峰,王亚男,杨庆祥,马鹏程,蔡传博.Mg-4Zn-0.5Er-1Y镁合金板材的组织与力学性能[J].特种铸造及有色合金,2010,30(12):1086-1089+1071. DOI：

Wang ZhongJun1, Li Zhifeng1, Wang Yanan1, et al. Microstructure and Mechanical Properties of Mg-4Zn-0.5Er-1Y Magnesium Alloy Sheet[J]. Special Casting & Nonferrous Alloys, 2010,30(12):1086-1089. DOI：

摘要

研究了Mg-4Zn-0.5Er-1Y变形合金轧制板材在经200～380℃,保温0.5～4h退火处理后,合金显微组织的演变及其力学性能的变化规律。结果表明,该合金退火后均出现明显的动态再结晶组织,且晶粒比较细小,基体中存在大量含有稀土元素的第二相,这些第二相在热轧状态下破碎成细小的颗粒,促进了动态再结晶晶粒的异质形核。合金退火处理后的强度较原轧制态降低,但塑性却得到明显的改善。最佳退火温度为350℃,保温0.5h后晶粒尺寸约为8μm,抗拉强度为276MPa,伸长率达到最大为22.5%。经过计算可知,该合金再结晶晶界迁移激活能为22.76kJ/mol,同时建立了该合金再结晶晶粒长大的动力学模型。

译

Abstract

Microstructure evolution and mechanical properties of rolled Mg-4Zn-0.5Er-1Y alloy sheets with annealing at 200³80℃ for 0.5⁴ h were investigated. It is found that distinct dynamic recrystallization grain with fine size can be observed in the annealed alloy sheets. Amounts of secondary phase containing RE exist in the matrix alloy, which are broken into fine particle after hot rolling to promote the heterogeneous nucleation of dynamic recrystallization grain. Strength of the alloy sheet after annealing treatment is decreased with the obvious improvement of plasticity. The alloy sheet with approximately 8 μm in size exhibits desirable mechanical properties with annealing at 350℃ for half hour, such as tensile strength of 276MPa and elongation of 22.5%. Activation energy of grain boundary migration reaches 22.76kJ/mol. In addition, kinetics model of dynamic recrystallization grain growth was established.

译

关键词

热处理; 力学性能; 动态再结晶

译

Keywords

Heat Treatment; Mechanical Properties; DRX

译

摘要

研究了Mg-4Zn-0.5Er-1Y变形合金轧制板材在经200～380℃

保温0.5～4h退火处理后

合金显微组织的演变及其力学性能的变化规律。结果表明

该合金退火后均出现明显的动态再结晶组织

且晶粒比较细小

基体中存在大量含有稀土元素的第二相

这些第二相在热轧状态下破碎成细小的颗粒

促进了动态再结晶晶粒的异质形核。合金退火处理后的强度较原轧制态降低

但塑性却得到明显的改善。最佳退火温度为350℃

保温0.5h后晶粒尺寸约为8μm

抗拉强度为276MPa

伸长率达到最大为22.5%。经过计算可知

该合金再结晶晶界迁移激活能为22.76kJ/mol

同时建立了该合金再结晶晶粒长大的动力学模型。

Abstract

Microstructure evolution and mechanical properties of rolled Mg-4Zn-0.5Er-1Y alloy sheets with annealing at 200

80℃ for 0.5

h were investigated. It is found that distinct dynamic recrystallization grain with fine size can be observed in the annealed alloy sheets. Amounts of secondary phase containing RE exist in the matrix alloy

which are broken into fine particle after hot rolling to promote the heterogeneous nucleation of dynamic recrystallization grain. Strength of the alloy sheet after annealing treatment is decreased with the obvious improvement of plasticity. The alloy sheet with approximately 8 μm in size exhibits desirable mechanical properties with annealing at 350℃ for half hour

such as tensile strength of 276MPa and elongation of 22.5%. Activation energy of grain boundary migration reaches 22.76kJ/mol. In addition

kinetics model of dynamic recrystallization grain growth was established.