Effect of pre-deformation on microstructure and mechanical properties of WE43 magnesium alloy II: Aging at 250 and 300℃

• 作者: H.Yan J.C.Huang R.S.Chen S.C.Wang Y.H.Kang Z.H.Huang
• 来源期刊: 镁合金学报(英文)
• 学科: 工学
• 关键词: WE43 magnesium alloy PRE-DEFORMATION AGING MICROSTRUCTURE Mechanical properties
• 年，卷（期）: 2020,（1）
• 页码范围: 103-110
• 页数: 8页
• 分类号: TG1

摘要

In this work,the microstructural evolution and mechanical properties of a pre-deformed WE43 magnesium alloy when aged at 250 and 300℃ were further investigated.It is found that the abundant deformation twins introduced by pre-deformation were maintained within the alloy during the aging treatment.Second particles formed at the twin boundaries and coarsened with aging time,especially at 300℃.When peak-aged at 250℃,the fine metastable β'''and β' precipitates formed in the un-deformed alloy have been transformed into relatively large β1 and β precipitates by the pre-deformation.While peak-aged at 300℃,the pre-deformation obviously refined the β precipitates.Mechanical properties indicate that pre-deformation can increase the yield strength by 19MPa and 54MPa for the peak-aged alloy at 250℃ and 300℃,respectively,and will not obviously deteriorate the tensile elongations.