Surface Mechanical Properties of Ultrasonic Rolling Micro-forging Additive Manufactured Parts

doi:10.12068/j.issn.1005-3026.2023.05.004

Abstract

Abstract: Defects such as cracks and high surface roughness are likely to occur in the additive manufacturing of Ti-6Al-4V titanium alloy parts. In order to solve this problem， the ultrasonic rolling micro-forging technology， which is applied in surface strengthening， is combined with the additive manufacturing process. The process of laser fuse additive manufacturing and cooling is simulated by the finite element software， and the effect of ultrasonic rolling micro-forging on the mechanical properties of the additive part surface is analyzed. The results show that the residual stress changes from tensile stress to compressive stress after ultrasonic rolling micro-forging， which effectively reduces the risk of defects such as cracks in additive parts. Meanwhile， the surface equivalent plastic strain and surface micro-hardness of the processed additive increase. In addition， ultrasonic rolling micro-forging has the greatest influence on the contact area of the rolling head.

Key words: Ti-6Al-4V titanium alloy; additive part; ultrasonic rolling micro-forging; surface mechanical property

CLC Number:

TH142.2

REN Zhao-hui， LI Zhu-hong， WANG Yun-he， ZHANG Zi-ting. Surface Mechanical Properties of Ultrasonic Rolling Micro-forging Additive Manufactured Parts[J]. Journal of Northeastern University(Natural Science), 2023, 44(5): 634-641.

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