Elastic Modulus of Fe72.5Ga27.5 Magnetostrictive Alloy

作     者：ZHU Xiao-Xi LIU Jing-Hua JIANG Cheng-Bao 

作者机构：School of Materials Science and Engineering Beihang University Beijing 100083 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2010年第27卷第6期

页      面：213-216页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0704[理学-天文学] 

基　　金：Supported by the Key Project of the National Science Foundation of China under Grant No 50531010 and the Innovation Foundation of BUAA for PhD Graduates 

主　　题：Elasticity Testing Testes Computers Alloys Magnetic field Sampling Fields District of Columbia Pressing 

摘      要：The elastic modulus of Fe72.5Ga27.5 magnetostrictive alloy is determined by testing ac impedance resonance frequency and first-principle calculations. The observed elastic modulus is 90.2 GPa for a directionally solidified sample and 103.4 GPa for a water-quenched sample tested in a dc magnetic field of 32. 7mT without compressive pre-stress. The bulk modulus by first-principles calculation is 179.3GPa which is basically consistent with the experimental result. The elastic modulus first increases and then decreases with increasing dc magnetic field, attributed to magnetostriction occurrence in the Fe72.5Ga27.5 alloy. The elastic modulus increases with increasing compressive pre-stress, resulting from the initial magnetic states change under the applied compressive pre-stress. The elastic modulus increases match well with the improved magnetostriction after quenching.