快速凝固NiMnGa合金薄带中的织构及退火温度对织构的影响  

Texture in Melt-Spun NiMnGa Ribbons and Influence of Annealing Temperature on Texture Evolution

作　　者：尚尔峰 李宗宾 段双 王志明 SHANG Er-feng;LI Zong-bin;DUAN Shuang;WANG Zhi-ming(Shenyang Research Institute of Foundry Co.,Ltd.,State Key Laboratory of Light Alloy Foundry Technology for High-End Equipment,Shenyang 110022,Liaoning,China;School of Materials Science and Engineering,Northeastern University,Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,Shenyang 110819,Liaoning,China)

机构地区：[1]沈阳铸造研究所有限公司高端装备轻合金铸造技术国家重点实验室,辽宁沈阳110022 [2]东北大学材料科学与工程学院材料各向异性与织构教育部重点实验室,辽宁沈阳110819

出　　处：《铸造》2018年第10期910-914,共5页Foundry

摘　　要：采用快速凝固技术制备了名义成分为Ni_(50)Mn_(25)Ga_(25)的合金薄带。与铸态合金相比,快凝薄带微观组织细小、均匀。快凝薄带在室温下为立方L2_1结构,退火后其室温结构保持不变。快凝薄带中存在{001}<100>组分的织构;低温退火后,织构类型及强度基本不变;高温退火后织构强度明显弱化。Ni50Mn25Ga25 ribbons were prepared by the melt-spun technique. The ribbons had fine and uniform grains compared to the as-cast alloy ingot. The structure of the ribbons was cubic ordered L21 structure at room temperature, which kept unchanged after annealing at different temperatures. The texture existed in the ribbons and the main orientation component was {001 }〈100〉. The intensity and component of the texture did not alter after annealing at low temperature. However, the texture intensity was lowered down obviously after annealing at high temperature.

关 键 词：铁磁形状记忆合金 NIMNGA 快速凝固 织构 

分 类 号：TG142.77[一般工业技术—材料科学与工程]