Effect of sintering temperature on microstructure and properties of porous Ti-15Al alloy

Zhang Meili; Dai Weili; Liu Yanfeng; Han Xi

doi:10.7513/j.issn.1004-7638.2022.04.009

Volume 43 Issue 4

Sep. 2022

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Zhang Meili, Dai Weili, Liu Yanfeng, Han Xi. Effect of sintering temperature on microstructure and properties of porous Ti-15Al alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 55-61. doi: 10.7513/j.issn.1004-7638.2022.04.009

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Zhang Meili, Dai Weili, Liu Yanfeng, Han Xi. Effect of sintering temperature on microstructure and properties of porous Ti-15Al alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 55-61. doi: 10.7513/j.issn.1004-7638.2022.04.009

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Effect of sintering temperature on microstructure and properties of porous Ti-15Al alloy

doi: 10.7513/j.issn.1004-7638.2022.04.009

Zhang Meili^{1, 2
,},
Dai Weili^{1, 2},
Liu Yanfeng^{1, 2},
Han Xi^{1, 2}

1.
Shannxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo University, Shangluo 726000, Shannxi, China
2.
Shannxi Engineering Research Center for Mineral Resources Clean & Efficient Conversion and New Materials, Shangluo University, Shangluo 726000, Shannxi, China

Received Date: 2022-03-14
Publish Date: 2022-09-14

Abstract

Abstract

The porous Ti-15Al alloy materials were prepared by powder metallurgy with Ti and Al powder as raw materials. The effects of different sintering temperatures on the phase composition, micropore structure, compressive and corrosion resistance were studied. The results show that the equilibrium phase of α-Ti and Ti₃Al is formed due to partial diffusion and solid-phase reaction between metal Ti and Al after the porous Ti-15Al alloy sintered at high temperature. With the increase of sintering temperature, the structure gradually changes from elongated through-holes to nearly spherical closed pores, and the porosity and average pore size both increases first and then decreases. The porosity and pore size after sintering at 1 300 ℃ reach the minimum, with values of 11.6% and 13.8 μm, respectively. Due to the change of pore structure, the compressive strength and corrosion resistance of porous Ti-15Al alloy increase first and then decrease with the increase of sintering temperature. The compressive strength and corrosion resistance of porous Ti-15Al alloy are the best when the sintering temperature is 1 300 ℃, the maximum compressive strength is 79 MPa, and the minimum corrosion current density is 2.05×10⁻⁷ A/cm².
- porous Ti-15Al alloy,
- powder metallurgy,
- sintering temperature,
- phase composition,
- pore structure,
- compressive strength,
- corrosion resistance

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References(15)

References

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