Lattice strain during compressive loading of AlCrFeNiTi multi-principal element alloys

Abstract In this work, multi-principal element alloys (MPEAs) with the five base elements Al, Cr, Fe, Ni and Ti plus in minor amounts were produced by powder metallurgy their microstructure elastic behavior analyzed via light scanning electron microscopy, backscatter diffraction (EBSD) synchrotron X-ray diffraction. The two studied compositions are an MPEA equimolar ratio as well a similar composition concentration of reduced to 10 mol%. goal is analyze microstructural these during macroscopic loading dependence chemical phases present. Analysis predicts presence body-centered cubic phases, Full Heusler-phases C14_Laves-phases both compositions, MPEA5 MPEA_Ti10. Synchrotron offers possibility monitor deformation specimens. Thermodynamic calculations stable predicted consisting at room temperature. Further calculation experiments showed stabilization C14_Laves-phase ( $$\hbox {Fe}_2\hbox {Ti}$$ Fe 2 Ti ) temperature decreasing amount Ti. development long un-branched cracks compressive testing, which resulted remarkable decrease lattice-dependent moduli. MPEA_Ti10 exhibited branched compression tests. Also, moduli did not change notably Heusler-phase lowest moduli, hence taking largest share overall among all present materials under loading.