Abstract
A study on the influence of aging heat treatment conditions at 823 K for 3 h, 24 h, and 120 h, on microstructure, martensitic transformation, and magnetic and mechanical properties of Co50Ni23Ga27−XAlX alloys (X = 0 and 1 at.%) was performed by using x-ray diffraction (XRD) analysis, optical microscopy (OM), energy-dispersive spectrometer (EDS), differential scanning calorimeter (DSC), and vibrating sample magnetometer (VSM). The results show that the microstructure of both aged alloys consists of martensite and fcc second γ phase in addition to ordered cubic gamma prime (γ′) phase precipitates in martensite. The martensitic transformation temperature peak (Mp) elevates with prolonging aging time and decreasing valence electron concentration (ev/a). Saturation magnetization (Ms) decreases, whereas both remanence magnetization (Mr) and coercivity (Hc) increase with aging time. Meanwhile, the aging time enhances the hardness property (Hv) of the investigated alloys.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
