Prediction of Adiabatic Shear Localization Fracture in High Speed Machining

2016 ◽  
Vol 52 (5) ◽  
pp. 185
Author(s):  
Liyao GU
Keyword(s):  
High Speed ◽  
Shear Localization ◽  
Adiabatic Shear ◽  
High Speed Machining

Some Metallurgical Observations of Adiabatic Shear Phenomenon During High Speed Machining AISI 1045 Hardened Steel

2011 ◽  
Vol 4 (6) ◽  
pp. 2493-2497 ◽  
Author(s):  
Chunzheng Duan ◽  
Haiyang Yu ◽  
Honghua Li ◽  
Minjie Wang
Keyword(s):  
High Speed ◽  
Hardened Steel ◽  
Adiabatic Shear ◽  
High Speed Machining ◽  
Aisi 1045

Chip Formation Characteristics in High-Speed Machining of Hardened AISI1045 Steel

2012 ◽  
Vol 565 ◽  
pp. 484-489
Author(s):  
Bing Wang ◽  
Zhan Qiang Liu ◽  
Qi Biao Yang
Keyword(s):  
Shear Band ◽  
Chip Formation ◽  
High Speed ◽  
Adiabatic Shear Band ◽  
Cutting Speed ◽  
Adiabatic Shear ◽  
High Speed Machining ◽  
Micro Hardness ◽  
Serrated Chip ◽  
Aisi1045 Steel

Analyzing mechanism of the chip formation is a significant way to understand the metal cutting process better. The characterization of serrated chip formation in high speed machining of hardened AISI1045 steel is investigated with the aid of optical microscopy and micro-hardness measurement in this paper. The chip morphology evolving from continuous one to serrated one with the cutting speed increasing from 100-1500m/min is observed. Compared with the continuous chip pattern, serrated chip has its particular characterization parameters. The characteristics of serration degree and the segmentation frequency of the serrated chip are presented. The micro-hardness at the adiabatic shear band of serrated chip is then measured. The results show that the serration degree and segmentation frequency of serrated chip have a tendency of enhancement with the cutting speed increasing. The micro-hardness along the adiabatic shear band increases with the cutting speed increasing due to severe strain hardening. With a critical speed at about 100-200m/min, micro-hardness decreases from the tool-chip interface to the free surface of the chip.

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