US 2026/0308722 A1Published application

High-strength and high-impact toughness near-beta titanium alloy, and preparation method and use thereof

AssigneeCentral South University

InventorsLibin LIU, Kaige WANG, Ligang ZHANG, Yueyan TIAN

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Abstract

Provided are a high-strength and high-impact toughness near-β titanium alloy, and a preparation method and use thereof, belonging to the technical field of titanium alloy. The high-strength and high-impact toughness near-β titanium alloy provided includes chemical elements as follows: in percentage by mass, 3.2-4.5% of Mo, 2.5-4% of Cr, 0.5-1.8% of Fe, and 0.5-3% of Al, with a balance being Ti and unavoidable impurities, a component ratio of which satisfies 9<[Mo]eq<11; where the high-strength and high-impact toughness near-β titanium alloy has a metallographic structure including a coarse α-lamellar structure and a fine α-lamellar structure.

Claims13

Dependent claims

A high-strength and high-impact toughness near-β titanium alloy, comprising chemical elements as follows:

in percentage by mass, 3.2-4.5% of Mo, 2.5-4% of Cr, 0.5-1.8% of Fe, and 0.5-3% of Al, with a balance being Ti and unavoidable impurities, wherein
a molybdenum equivalent of the high-strength and high-impact toughness near-β titanium alloy is denoted as [Mo]eq, and the [Mo]eq satisfies 9<[Mo]eq<11;
the [Mo]eq is obtained according to equation I:
[
Mo
]
e
⁢
q
=
1
[
Mo
]
+
1.6
[
Cr
]
+
2
⁢
.90
[
Fe
]
-
1
[
A
⁢
l
]
,
equation
⁢
I
where [Mo], [Cr], [Fe], and [Al] in the equation I respectively represent a mass percentage of each element in the high-strength and high-impact toughness near-β titanium alloy;
and
the high-strength and high-impact toughness near-β titanium alloy has a metallographic structure comprising a coarse α-lamellar structure and a fine α-lamellar structure.

37 more elements

Dependencies are inferred from the claim text.