Magnesium clad material, electronic device housing, and mobile object component
A magnesium clad material 100 includes, when a cross-section thereof cut in a thickness direction thereof is observed, a Mg layer ( 11 ), a first Al layer ( 12 ) made of pure Al or an Al alloy, and a first joint ( 13 ) made of pure Cu or a Cu alloy and arranged between the Mg layer and the first Al layer, and the magnesium clad material has a 0.2% proof stress of 150 MPa or more as measured in a tensile test under a room temperature atmosphere.
1. A magnesium clad material comprising when a cross-section thereof cut in a thickness direction thereof is observed:
a Mg layer made of a Mg—Li alloy and serving as a base layer;
a first Al layer made of pure Al or an Al alloy; and
a first joint made of pure Cu or a Cu alloy and arranged between the Mg layer and the first Al layer; wherein
the magnesium clad material has a 0.2% proof stress of 150 MPa or more as measured in a tensile test under a room temperature atmosphere; and
the Mg—Li alloy comprises LAZ921, LAZ931, or LAZ941, which contains Al and Zn, and has flame retardancy in that the Mg—Li alloy does not ignite in a flammability test at 1050° C.
2. The magnesium clad material according to claim 1 , wherein the 0.2% proof stress is 180 MPa or more.
3. The magnesium clad material according to claim 1 , wherein the 0.2% proof stress is 230 MPa or more and 270 MPa or less.
4. The magnesium clad material according to claim 1 , comprising when the cross-section thereof cut in the thickness direction thereof is observed:
a second Al layer made of Al or an Al alloy and arranged on a side of the Mg layer opposite to the first Al layer; and
a second joint made of Cu or a Cu alloy and arranged between the Mg layer and the second Al layer.
5. The magnesium clad material according to claim 1 , wherein the Al alloy has a composition corresponding to any one of 5000 series to 7000 series of alloy numbers described in JIS-H4000: 2014.
6. The magnesium clad material according to claim 5 , wherein the Al alloy has a composition corresponding to any one of the 5000 series to 6000 series of alloy numbers described in JIS-H4000: 2014.
7. The magnesium clad material according to claim 6 , wherein
the Al alloy has a composition corresponding to the 5000 series of alloy numbers described in JIS-H4000: 2014; and
the 0.2% proof stress is 190 MPa or more and 270 MPa or less.
8. The magnesium clad material according to claim 1 , wherein the Mg—Li alloy contains 2 mass % or more and 4 mass % or less of Al.
9. The magnesium clad material according to claim 1 , wherein the magnesium clad material has a 0.2% proof stress of 200 MPa or more measured in the tensile test under a room temperature atmosphere.
10. An electronic device housing made of a magnesium clad material, the magnesium clad material comprising when a cross-section thereof cut in a thickness direction thereof is observed:
a Mg layer made of a Mg—Li alloy and serving as a base layer;
a first Al layer made of pure Al or an Al alloy; and
a first joint made of pure Cu or a Cu alloy and arranged between the Mg layer and the first Al layer; wherein
the magnesium clad material has a 0.2% proof stress of 150 MPa or more as measured in a tensile test under a room temperature atmosphere; and
the Mg—Li alloy comprises LAZ921, LAZ931, or LAZ941, which contains Al and Zn, and has flame retardancy in that the Mg—Li alloy does not ignite in a flammability test at 1050° C.
11. A transport mobile object component made of a magnesium clad material, the magnesium clad material comprising when a cross-section thereof cut in a thickness direction thereof is observed:
a Mg layer made of a Mg—Li alloy and serving as a base layer;
a first Al layer made of pure Al or an Al alloy; and
a first joint made of pure Cu or a Cu alloy and arranged between the Mg layer and the first Al layer; wherein
the magnesium clad material has a 0.2% proof stress of 150 MPa or more as measured in a tensile test under a room temperature atmosphere; and
the Mg—Li alloy comprises LAZ921, LAZ931, or LAZ941, which contains Al and Zn, and has flame retardancy in that the Mg—Li alloy does not ignite in a flammability test at 1050° C.
12. A magnesium clad material comprising when a cross-section thereof cut in a thickness direction thereof is observed:
a Mg layer made of a Mg—Li alloy and serving as a base layer;
a first Al layer made of pure Al or an Al alloy; and
a first joint made of pure Cu or a Cu alloy and arranged between the Mg layer and the first Al layer; wherein
the magnesium clad material has a 0.2% proof stress of 150 MPa or more as measured in a tensile test under a room temperature atmosphere; and
the Mg—Li alloy comprises LXZ911 or LXZ921 which contains Ca and Zn.