Effect of Supersonic Fine Particle Bombardment Induced Surface Nanocrystallization on the Microstructure and Mechanical Properties of TC11 Alloy

WU Yongli; WANG Yinghui; XIONG Yi; ZHANG Xin; YANG Miaomiao

Volume 37 Issue 6

Dec. 2022

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Development and Application of Materials > 2022 > 37(6): 63-70.

WU Yongli, WANG Yinghui, XIONG Yi, ZHANG Xin, YANG Miaomiao. Effect of Supersonic Fine Particle Bombardment Induced Surface Nanocrystallization on the Microstructure and Mechanical Properties of TC11 Alloy[J]. Development and Application of Materials, 2022, 37(6): 63-70.

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Effect of Supersonic Fine Particle Bombardment Induced Surface Nanocrystallization on the Microstructure and Mechanical Properties of TC11 Alloy

1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China;
2. Luoyang Ship Material Research Institute, Luoyang 471023, China

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Received Date: June 21, 2022
Available Online: January 11, 2023

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Abstract

Abstract

The supersonic fine particle bombardment (SFPB) surface nanocrystallization technique is used to construct a gradient nanostructure with a certain layer depth on the surface of TC11 alloy, and the effect of SFPB gas pressure on the microstructure and mechanical properties of TC11 alloy is investigated. The results showed that a 25 μm-thick of severe plastic deformed layer is formed at a small gas pressure (0.5 MPa), and the surface grains are refined to the nanometer scale (17.7 nm). With the increase of gas pressure, the surface nanocrystal size decreases and the SPD layer increases. At the high gas pressure (1.5 MPa), the surface nanocrystal size and the depth of SPD layer are 9.4 nm and 51 μm, respectively. With the increase of SFPB gas pressure, the surface microhardness and the depth of hardened layer gradually increase, and the yield and tensile strengths increase significantly, while the elongation does not change much. The fracture morphology changes from the typical ductile fracture to the mixed ductile-brittle fracture.
- supersonic fine particle bombardment,
- TC11 alloy,
- lamellar microstructure,
- surface nanocrystallization,
- mechanical properties

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