Prediction of residual stress induced by high-frequency mechanical impact treatment

2022 ◽  
Author(s):  
Takeshi Hanji ◽  
Kazuo Tateishi ◽  
Suguru Kano ◽  
Masaru Shimizu
Keyword(s):  
Residual Stress ◽  
High Frequency ◽  
Mechanical Impact

scholarly journals Analytical, FEA, And Experimental Research of 2D-Vibration Assisted Cutting ( 2D-VAC) In Titanium Alloy Ti6Al4V

2021 ◽  
Author(s):  
Rendi Kurniawan ◽  
Farooq Ahmed ◽  
Gun Chul Park ◽  
Tae Jo Ko
Keyword(s):  
Residual Stress ◽  
Plastic Strain ◽  
Cutting Force ◽  
Frequency Modulation ◽  
High Frequency ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Von Mises Stress ◽  
Micro Hardness ◽  
Micro Structure

Abstract In the 2D-Vibration Assisted Cutting (2D-VAC) method, the cutting tool shakes in a 2-dimensional approach because of superimposed high-frequency modulation. This high-frequency modulation effect creates a displacement at a tiny scale of micrometers and causes an escalation in the resultant cutting speed. Consequently, 2D-VAC has superior advantages compared to traditional cutting (TC). This manuscript describes research on 2D-VAC that focuses on modeling cutting forces (mathematical model) and finite element analysis (FEA) results. The FEA results are focused on the von Mises stress, plastic strain, cutting force, cutting temperature, and residual stress. In addition, an experiment for the chip formation, micro-structure layer, and micro-hardness was also analyzed in this study. According to the modeling results, the cutting force has a comparable pattern to the FEA results. The stress contour result confirms that the 2D-VAC method has lower stress than that in the TC method during tool retraction mode. Additionally, the plastic strain in the 2D-VAC method can be higher than that in the TC method. According to the temperature results, the peak temperature in the 2D-VAC could be higher than that in the TC method. The residual stress shows that there is a compressive effect. Thus, the compressive stress is higher than that in the TC method. Micro-hardness results confirmed that there is not too much change from the original surface in the 2D-VAC method. The result of micro-structure morphology also confirmed that there is a significant shear deformation flow in case of the TC method, although less occurs in the 2D-VAC method.

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