High strength and high ductility tial-based intermetallic compound and process for producing the same
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYoshiya Fujiwara, Toshio Tokune
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Abstract
A high strength and high ductility TiAl-based intermetallic compound includes a content of aluminum in a range represented by 42.0 atom %.ltoreq.Al.ltoreq.50.0 atom %, a content of vanadium in a range represented by 1.0 atom %.ltoreq.V.ltoreq.3.0 atom %, a content of niobium in a range represented by 1.0 atom %.ltoreq.Nb.ltoreq.10.0 atom %, a content of boron in a range represented by 0.03 atom %.ltoreq.B.ltoreq.2.2 atom %, and the balance of titanium and unavoidable impurities. A product of the TiAl-based intermetallic compound is formed by only casting or casting followed by a homogenizing thermal treatment.
Claims3
A high strength and high ductility TiAl-based intermetallic compound consisting essentially of a content of aluminum (Al) in a range represented by 42.0 atom % .ltoreq.Al.ltoreq.50.0 atom %, a content of vanadium (V) in a range represented by 1.0 atom %.ltoreq.V.ltoreq.3.0 atom %, a content of niobium (Nb) in a range represented by 1.0 atom %.ltoreq.Nb.ltoreq.10.0 atom %, a content of boron (B) in a range represented by 0.03 atom %.ltoreq.B.ltoreq.2.2 atom %, and the balance of titanium and unavoidable impurities wherein the main phase of said compound is an Ll.sub.0 .gamma. phase, and the ratio c/a between both lattice constants "a" and "c" in the crystal structure of said Ll.sub.0 .gamma. phase being in a range represented by c/a.ltoreq.1.015.
Dependencies are inferred from the claim text.