材料科学
微观结构
合金
无扩散变换
差示扫描量热法
透射电子显微镜
扫描电子显微镜
磁性形状记忆合金
马氏体
凝聚态物理
光学显微镜
阻尼能力
冶金
磁场
结晶学
复合材料
磁畴
磁化
热力学
化学
纳米技术
物理
量子力学
作者
Diwei Wang,Hongkang Niu,Sibin Zhang,Weidong Xuan,Zhongming Ren,Qingchao Tian
出处
期刊:Metals
[MDPI AG]
日期:2022-12-20
卷期号:13 (1): 6-6
被引量:4
摘要
The directionally solidified MnCuNiFe alloy was prepared under high magnetic field. The microstructure, composition distribution, phase transformation behavior and damping capacity of the alloy were studied by means of metallographic microscope, scanning electron microscope, transmission electron microscope, X-ray diffraction, differential scanning calorimetry, thermal expansion analysis and dynamic mechanical analysis. It is revealed that magnetic field has definite effect on the refinement of dendrite microstructure as well as the enrichment of Ni element, and thus induces the occurrence of martensitic transformation at about 300 K. The preferred (111) orientation modulated by high magnetic field, especially the induced fct1 → fcc martensitic transformation, together with the twin boundary relaxation, ensure that the directionally solidified MnCuNiFe alloy prepared under high magnetic field owns high-damping capacity in a wide-temperature range from 200 K to 320 K.
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