Microstructure and Mechanical Properties of MgMnAlZnCu High Entropy Alloy Cooling in Three Conditions

Abstract

In this paper, alloy with composition of MgMnAlZnCu was designed by using the strategy of equiatomic ratio and high entropy of mixing. The microstructure and mechanical parameters of the new high entropy alloy cooling in three conditions were studied. The alloy was prepared by induction melting and then it was cast in copper molds in air, water and salt water respectively. The microstructure and properties of alloy samples were examined by microhardness tester, XRD, TEM, SEM and testing machine for material strength. The results showed that the alloy was composed mainly of h.c.p and Al-Mn quasicrystal phases. The alloy exhibit high hardness (431HV-467HV) and high compression strength (428MPa-450MPa) at room temperature. The alloy was fragile and the strains were from 3.29% to 5.53%.

A Novel Low-Density, High-Hardness, High-entropy Alloy with Close-packed Single-phase Nanocrystalline Structures

“…It had a density of 3.91 g cm −3 . Li et al [8,9] studied Mg-containing HEAs. These authors prepared Mg x (MnAlZnCu) 100−x alloys by induction melting and casting.…”

“…Similar structures and mechanical properties were subsequently observed in the equiatomic system cast and cooled in air, water, or brine solutions. [9] Chen et al used mechanical alloying to prepare BeCoMgTi and BeCoMgTiZn, but the alloys formed only an amorphous phase. [10] To our knowledge, no single-phase low-density high-entropy alloy (LDHEA) has been reported.…”

Evaluation of Calphad Approach and Empirical Rules on the Phase Stability of Multi-principal Element Alloys

“…In order to explore low-density MPEAs, several works [16,51,52] have been done on light weight elements such as, Li, Mg and Al. One published example is the AlLi-Mg-Sn-Zn system.…”

An Insight into Evolution of Light Weight High Entropy Alloys: A Review

“…Ammonium bicarbonate gets decomposed at 130 • C and created porosity in the compacts. After sintering of different volume percent of ammonium bicarbonate samples, 12,23,28,33, and 38 vol %, porosity was recorded. These samples were then characterized by microstructure, flexural strength, and corrosion properties under physiological conditions.…”

“…Sputtering, plasma nitriding, and cladding are the surface modification techniques used to produce thin films and thick layers of HEAs on various substrates. For LWHEA, an addition of low-density metals (Mg, Al, Ti, Be, Sc, and Li) is the criterion for designing, therefore, vacuum arc melting and mechanical alloying followed by sintering are the two main processing techniques that have been used by researchers [22][23][24][25][26][27][28][29].…”