陈琳,张文畅,王丹丹,黄光胜,郭慧,王玮璋

• 1:成都飞机工业(集团)有限责任公司
• 2:重庆大学材料科学与工程学院

摘要(Abstract)：

Mg-Zn-Ca-Ce镁合金轧制板材具有优异的室温成形性能，然而与其他镁合金体系板材相比其强度较低，阻碍该合金系的工业化应用。首先对Mg-1.5Zn-0.2Ca-0.2Ce镁合金进行了不同变形量(5%、7%和11%)的预拉伸变形及低温退火处理(150℃×1、5和10 h),随后研究了其经预拉伸及退火后的微观组织和力学性能演变规律。结果表明：Mg-1.5Zn-0.2Ca-0.2Ce镁合金经3道次热轧后形成均匀的再结晶组织，并在横向(TD)呈现出“椭圆形”的双峰织构；沿TD预拉伸过程中基面滑移具有较高的施密特因子，易于被激活并主导变形，致使预拉伸变形后合金的微观组织无明显变化；随后经低温长时间退火后(10 h),静态再结晶发生；随着预拉伸变形量增加，合金的屈服强度由125.9 MPa逐步提高至259.3 MPa(提高了～106%),抗拉强度提高至280.1 MPa,但仍保持较高的伸长率(24.6%),这主要归因于预拉伸变形在镁合金板材中引入的加工硬化。

关键词(KeyWords)： Mg-1.5Zn-0.2Ca-0.2Ce镁合金;预变形;热处理;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 陈琳,张文畅,王丹丹,黄光胜,郭慧,王玮璋

DOI: 10.13289/j.issn.1009-6264.2024-0593

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