摘要
采用XRD、OM、SEM和EDS等手段研究Sm对Mg-6Al-1.2Y-0.9Nd合金微观组织和力学性能的影响。结果表明,合金中加入Sm后,Sm优先与A1形成高熔点Al2Sm弥散颗粒质点,当Sm含量(1.5%～2.0%)较高时,合金内出现针状Mg12Nd相。在研究范围内,随Sm含量的增加,合金的常温和高温力学性能略有升高然后降低;而合金的延伸率呈现不断降低的趋势。合金的拉伸断口为具有塑性特征的准解理断裂。
Microstructures and mechanical properties of Mg-6Al-1.2Y-0.9Nd magnesium alloy with Sm addition were investigated through OM, SEM, EDS and XRD. The results show that Sm combines firstly with AI to form dispersed, high-melting-point particles which are mainly Al2Sm phase. When the mass fraction of Sm is high from 1.5% to 2.0%, the acicular Mgl2Nd phase appears in the alloy. With the increase of Sm content within the range from 0 to 2.0%, the tensile strength of alloys at ambient and elevated temperature firstly increases slightly, and then decreases; while the elongation decreases continuously. The tensile fracture of the alloy is quasi-cleavage failure with plastic characteristic,
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2010年第1期96-100,共5页
Rare Metal Materials and Engineering
基金
河南省杰出人才计划(084200510018)
洛阳市科技攻关项目(0602018A)
河南科技大学重大预研专项(2007ZD002)
关键词
钐
镁合金
显微组织
力学性能
Sm
magnesium alloy
microstructure
mechanical properties
