Surface softening mechanism based on microstructure analyses under ultrasonic impact condition for Ti-17 titanium alloy

Abstract

Ultrasonic impact significantly influences the mechanical properties and flow stress of Ti-17 titanium alloy. In this study, compression tests on Ti-17 titanium alloy were conducted under ultrasonic impact conditions, varying ultrasonic amplitudes and compression rates. The flow stress, surface elemental content, microhardness, and microstructure of Ti-17 titanium alloy were tested, and the softening mechanism of Ti-17 titanium alloy under ultrasonic impact conditions was investigated. The results indicate that the softening mechanism of Ti-17 titanium alloy involved ultrasonic softening combined with stress superposition. Ultrasonic impact leads to a higher distribution of grain orientation differences, alters the distribution of small-angle grain boundaries, and changes the distribution of surface phases, resulting in a reduced density of α phases. The geometrically necessary dislocation density at the surface increases, and the average grain size decreases from 2.91 μm to 2.73 μm. The Brass-type texture essentially disappears, transforming mainly into a Copper-type texture {112}<11-1>, with the maximum pole density decreasing from 73.98 to 39.88.

Keywords

Ultrasonic impact / Ti-17 / Softening mechanism

References

[1] LiuC, ZhangH, ChuX, et al.. Investigation on electric pulse-ultrasonic assisted incremental forming of AZ31B Mg alloy. J Mater Eng Perform, 2023.

[2] LiQ, YuanS, LiZ, et al.. Mechanical response and microstructure revolution of SiC particle-reinforced Al-MMCs under ultrasonic loading. Compos Part A Appl Sci Manuf, 2023.

[3] ZhouY, WangZ, ZhaoJ, et al.. Effect of ultrasonic amplitude on interfacial characteristics and mechanical properties of Ti/Al laminated metal composites fabricated by ultrasonic additive manufacturing. Addit Manuf, 2023.

[4] HuJ, ShimizuT, YangM. Investigation on ultrasonic volume effects: Stress superposition, acoustic softening and dynamic impact. Ultrason Sonochem, 2018, 48: 240-248.

[5] PreszW. Dynamic effect in ultrasonic assisted micro-upsetting. AIP ConfProc, 2018, 19601. 100012

[6] HuJ, ShimizuT, YoshinoT, et al.. Ultrasonic dynamic impact effect on deformation of aluminum during micro-compression tests. J Mater Process Technol, 2018, 258: 144-154.

[7] HuJ, ShimizuT, YangM. Impact effect of superimposed ultrasonic vibration on material characteristics in compression tests. Procedia Eng, 2017, 207: 1063-1068.

[8] KhriptaNI, KarasevskaOP, MordyukBN. Surface layers of Zr-18%Nb alloy modified by ultrasonic impact treatment: microstructure, hardness and corrosion. J Mater Sci, 2017, 26(11): 5446-5455

[9] ShaoC, WangZ, LiJ, et al.. Investigation of microstructure evolution and mechanical properties of 2A10 aluminum alloy during ultrasonic vibration plastic forming. J Mater Res Technol, 2023, 23: 2467-2478.

[10] ZohrevandM, Aghaie-KhafriM, ForouzanF, et al.. Microstructural evolutions under ultrasonic treatment in 304 and 316 austenitic stainless steels: impact of stacking fault energy. Steel Res Int, 2021, 92(9): 1-12.

[11] BaiY, YangM. The influence of superimposed ultrasonic vibration on surface asperities deformation. J Mater Process Technol, 2016, 229: 367-374.

[12] ZhaoY, ZhaiJ, GuanY, et al.. Molecular dynamics study of acoustic softening effect in ultrasonic vibration assisted tension of monocrystalline/polycrystalline coppers. J Mater Process Technol, 2022, 307. 117666

[13] LiuY, WangC, BiR. Acoustic residual softening and microstructure evolution of T2 copper foil in ultrasonic vibration assisted micro-tension. Mater Sci Eng, A, 2022, 841. 143044

[14] LiZ, LiX, HuangZ, et al.. Ultrasonic-vibration-enhanced plasticity of an entropic alloy at room temperature. Acta Mater, 2022, 225. 117569

[15] NagarajanB, KumarD, FanZ, et al.. Effect of deep cold rolling on mechanical properties and microstructure of nickel-based superalloys. Mater Sci Eng A, 2018, 728: 196-207.

[16] MengB, CaoBN, WanM, et al.. Constitutive behavior and microstructural evolution in ultrasonic vibration assisted deformation of ultrathin superalloy sheet. Int J Mech Sci, 2019, 157: 609-618.

[17] ZhangR, XuZ, PengL, et al.. Intragranularly misoriented grain boundary evolution affected by local constraints and grain size in micro-scale deformation of ultra-thin metallic sheets. Int J Plast, 2022, 157. 103377

[18] WangX, WangC, LiuY, et al.. An energy based modeling for the acoustic softening effect on the Hall-Petch behavior of pure titanium in ultrasonic vibration assisted micro-tension. Int J Plast, 2021, 136. 102879

[19] LiWT, LiH, FuMW. Interactive effect of stress state and grain size on fracture behaviours of copper in micro-scaled plastic deformation. Int J Plast, 2019, 114: 126-143.

[20] ShamseddineI, PennecF, BiwoleP, et al.. Supercooling of phase change materials: a review. Renew Sust Energ Rev, 2022, 158. 112172

[21] ZhouH, CuiH, QinQH, et al.. A comparative study of mechanical and microstructural characteristics of aluminium and titanium undergoing ultrasonic assisted compression testing. Mater Sci Eng A, 2017, 682: 376-388.

[22] ChenJ, WangZ, KorsunskyAM. Multiscale stress and strain statistics in the deformation of polycrystalline alloys. Int J Plast, 2022, 152. 103260

[23] LouY, LiuX, HeJ, et al.. Ultrasonic-assisted extrusion of ZK60 Mg alloy micropins at room temperature. Ultrasonics, 2018, 83: 194-202.

[24] LiJ, QuH, BaiJ. Grain boundary engineering during the laser powder bed fusion of TiC/316L stainless steel composites: new mechanism for forming TiC-induced special grain boundaries. Acta Mater, 2022, 226. 117605

[25] NazarovAA, MurzinovaMA, MukhametgalinaAA, et al.. Bulk ultrasonic treatment of crystalline materials. Metals, 2023, 132344.

Funding

National Natural Science Foundation of China(92160301)

National Postdoctoral Program for Innovative Talents(No.2022TD-60)

RIGHTS & PERMISSIONS

Shanghai University and Periodicals Agency of Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature