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Titanium alloy with double-scale structure based on in-situ whisker strengthening and toughening and its preparation and application

A toughening, dual-scale technology used in the field of titanium alloy materials to improve efficiency and shorten ball milling time

Active Publication Date: 2018-09-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no literature disclosing the introduction of whiskers into titanium alloys with dual-scale structures to further enhance the toughness of titanium alloys.

Method used

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  • Titanium alloy with double-scale structure based on in-situ whisker strengthening and toughening and its preparation and application
  • Titanium alloy with double-scale structure based on in-situ whisker strengthening and toughening and its preparation and application
  • Titanium alloy with double-scale structure based on in-situ whisker strengthening and toughening and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Mixing powder: select the alloy composition as Ti 68.3 Nb 13.6 Cu 5.1 Ni 6 al 6.5 B 0.5 (atomic percentage), calculate the mass ratio according to the atomic ratio and then carry out the powder batching. The Ti, Nb, Cu, Ni and Al powders selected in this example are elemental powders prepared by atomization or electrolysis of 48 μm, and the B powder The particle size is 1-5μm. After the preparation, the element powder is mixed evenly in the powder mixer.

[0033] (2) Preparation of alloy powder by high-energy ball milling: Place the uniformly mixed alloy powder in a planetary ball mill (QM-2SP12) for high-energy ball milling. The ball milling medium such as the tank body and ball material of the ball mill are all stainless steel, and the diameters of the balls are respectively 15, 10 and 6mm, their weight ratio is 1:3:1. The high-energy ball milling process parameters are as follows: the ball mill tank is filled with high-purity argon (99.999%, 0.5MPa) for pro...

Embodiment 2

[0041] (1) Mixing powder: select the alloy composition as Ti 67.8 Nb 13.6 Cu 5.1 Ni 6 al 6.5 B 1 (atomic percentage), calculate the mass ratio according to the atomic ratio and then carry out the powder batching. The Ti, Nb, Cu, Ni and Al powders selected in this example are elemental powders prepared by atomization or electrolysis of 48 μm, and the B powder The particle size is 1-5μm, and the element powder is mixed evenly in the powder mixer after preparation.

[0042] (2) Preparation of alloy powder by high-energy ball milling: Place the uniformly mixed alloy powder in a planetary ball mill (QM-2SP12) for high-energy ball milling. The ball milling medium such as the tank body and ball material of the ball mill are all stainless steel, and the diameters of the balls are respectively 15, 10 and 6mm, their weight ratio is 1:3:1. The high-energy ball milling process parameters are as follows: the ball mill tank is filled with high-purity argon (99.999%, 0.5MPa) for protec...

Embodiment 3

[0049] (1) Mixing powder: select the alloy composition as Ti 58 Nb 14 Cu 9 Ni 8 al 8 B 3 (atomic percentage), calculate the mass ratio according to the atomic ratio and then carry out the powder batching. The Ti, Nb, Cu, Ni and Al powders selected in this example are elemental powders prepared by atomization or electrolysis of 48 μm, and the B powder The particle size is 1-5μm, and the element powder is mixed evenly in the powder mixer after preparation.

[0050] (2) Preparation of alloy powder by high-energy ball milling: Place the uniformly mixed alloy powder in a planetary ball mill (QM-2SP12) for high-energy ball milling. The ball milling medium such as the tank body and ball material of the ball mill are all stainless steel, and the diameters of the balls are respectively 15, 10 and 6mm, their weight ratio is 1:3:1. The high-energy ball milling process parameters are as follows: the ball mill tank is filled with high-purity argon (99.999%, 0.5MPa) for protection, th...

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Abstract

The invention belongs to the field of titanium alloy materials, and discloses a double-scale structure titanium alloy based on in-situ whisker strengthening and toughening and a preparation method and application of the double-scale structure titanium alloy. The titanium alloy comprises elements including, by atomic percent, 58%-70% of Ti, 9%-16% of Nb, 4%-9% of Cu, 4%-9% of Ni, 2%-8% of Al and 0.5%-3% of B. According to a microstructure of the titanium alloy, part of ultra-fine grain fcc MTi2 is distributed along a micron grain bcc beta-Ti base body grain boundary in a long-strip-shaped manner, part of ultra-fine grain fcc MTi2 is distributed in the micron grain bcc beta-Ti in a long-strip-shaped manner, ultra-fine grain in-situ TiB whiskers are distributed in the ultra-fine grain fcc MTi2 and a micron grain bcc beta-Ti of the grain boundary, and M is equal to Cu and Ni. The fine-needle-shaped in-situ TiB whiskers are introduced in a double-scale structure of an ultra-fine grain second phase and a micron equiaxed grain base body, and further strengthening and toughening of the material are achieved.

Description

technical field [0001] The invention belongs to the field of titanium alloy materials, and in particular relates to a double-scale structure titanium alloy based on in-situ whisker strengthening and toughening, as well as its preparation and application. Background technique [0002] As an advanced lightweight metal structure material, titanium alloy is widely used in aerospace, aviation, automobile, chemical industry, shipbuilding, Medical, energy and other fields. However, as an important engineering structural material, the rapid development of modern industry has continuously increased the requirements for the service temperature and strength and toughness of titanium alloy materials. Therefore, it has always been the goal pursued by researchers to design and prepare titanium alloys with higher strength and toughness, simpler process and lower production cost to meet the application under more severe conditions. The topic of "Lightweight and High-Strength Metal Structu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/04
CPCC22C1/0458C22C14/00
Inventor 李元元李洛杨超王芬张卫文罗宗强
Owner SOUTH CHINA UNIV OF TECH
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