ECAP挤压道次对AZ81镁合金组织及性能的影响
发布时间：2018-08-02 10:37
【摘要】：AZ81镁合金在汽车行业应用广泛,但存在组织粗大,力学性能差等缺点。等通道转角挤压(ECAP)法是细化晶粒,提高镁合金性能的有效途径。在300℃下对AZ81镁合金进行了1~6道次ECAP挤压,并分析了AZ81镁合金在ECAP挤压变形过程中微观组织与力学性能随挤压道次的变化规律。结果表明,随着挤压道次的增加,基体晶粒尺寸先减小后增加,4道次时细化程度最高;合金硬度先增大后减小,4道次时合金硬度最高,达到142HL;合金的抗拉强度伸长率逐渐增强后减小,再增大,6道次时合金的综合拉伸性能达到最高,抗拉强度210 MPa,伸长率15.8%。
[Abstract]:AZ81 magnesium alloy is widely used in automobile industry, but it has some disadvantages such as coarse microstructure and poor mechanical properties. Equal channel angular extrusion (ECAP) is an effective way to refine the grain and improve the properties of magnesium alloys. AZ81 magnesium alloy was extruded at 300 鈩，
本文编号：2159154
[Abstract]:AZ81 magnesium alloy is widely used in automobile industry, but it has some disadvantages such as coarse microstructure and poor mechanical properties. Equal channel angular extrusion (ECAP) is an effective way to refine the grain and improve the properties of magnesium alloys. AZ81 magnesium alloy was extruded at 300 鈩，
本文编号：2159154
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