Lightweight dual-phase alloys
AssigneeGM Global Technology Operations LLC
InventorsZhongyi Liu, Frederick E. Pinkerton
Life of this patent
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Abstract
According to aspects of the present disclosure, a ternary alloy includes a dual-phase microstructure including a first phase and a second phase. The first phase defines a hexagonal close-packed structure with a stoichiometric ratio of Al4Fe1.7Si. The second phase defines a face-centered cubic structure with a stoichiometric ratio of Al3Fe2Si. The dual-phase microstructure is stable above about 800° C., and the dual-phase microstructure has a first-phase abundance greater than about 50 parts by weight and a second-phase abundance less than about 50 parts by weight based on 100 parts by weight of the ternary alloy.
Claims18
An alloy comprising:
- a dual-phase microstructure consisting of aluminum, iron, and silicon, wherein the dual-phase microstructure has:
- a first phase defining a hexagonal close-packed structure having a stoichiometric ratio of Al4Fe1.7Si, and
- a second phase defining a face-centered cubic structure having a stoichiometric ratio of Al3Fe2Si,
- wherein the dual-phase microstructure is stable above about 800° C., and wherein the dual-phase microstructure has a first-phase abundance greater than about 50 parts by weight and a second-phase abundance less than about 50 parts by weight based on 100 parts by weight of the alloy.
A method comprising:
- obtaining a first phase consisting of aluminum, iron, and silicon, the first phase defining a hexagonal close-packed structure having a stoichiometric ratio of Al4Fe1.7Si;
- obtaining a second phase consisting of aluminum, iron, and silicon, the second phase defining a face-centered cubic structure having a stoichiometric ratio of Al3Fe2Si;
- and
- combining the first phase and the second phase using solid-state processing to produce an alloy including a dual-phase microstructure, the dual-phase microstructure having a first-phase abundance greater than about 50 parts by weight and a second-phase abundance less than about 50 parts by weight based on 100 parts by weight of the alloy.
A vehicle component consisting of:
- a ternary alloy having a dual-phase microstructure including:
- a first phase defining a hexagonal close-packed structure having a stoichiometric ratio of Al4Fe1.7Si, and
- a second phase defining a face-centered cubic structure having a stoichiometric ratio of Al3Fe2Si,
- wherein the dual-phase microstructure is stable below about 800° C., and wherein the dual-phase microstructure has a first-phase abundance greater than about 50 parts by weight and a second-phase abundance less than about 50 parts by weight based on 100 parts by weight of the alloy.
Dependencies are inferred from the claim text.