MgAl2Cu is an intermetallic compound combining magnesium, aluminum, and copper—a hard, brittle phase that typically appears as a constituent in magnesium-aluminum casting alloys rather than as a standalone engineering material. It is primarily encountered in die-cast and permanent-mold magnesium alloy systems (such as AZ91D and AM60B), where it forms during solidification and contributes to strength and hardness, particularly at elevated temperatures. Engineers specify magnesium alloys containing this phase for weight-critical applications where moderate stiffness and thermal stability matter more than ductility; however, the presence of MgAl2Cu can reduce fracture toughness, making alloy composition and heat treatment critical design decisions in aerospace, automotive, and portable electronics.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 11,305 | ksi | — | ||
| ↳ | 11,305 | ksi | — | ||
| ↳ | 11,236.1 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.3663 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν)2 entries | 0.2440 | - | — | ||
| ↳ | 0.2400 | - | — | ||
Shear Modulus(G)3 entries | 6,980.5 | ksi | — | ||
| ↳ | 6,980.5 | ksi | — | ||
| ↳ | 7,388.2 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1275 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | 6.840 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.2154 | eV/atom | — |