Cut quality assessment of CO2 laser cutting of twinning-induced plasticity steel sheets

Author(s):  
Pasquale Russo Spena ◽  
Manuela De Maddis ◽  
Franco Lombardi
Metals ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 456 ◽  
Author(s):  
Pasquale Russo Spena

2008 ◽  
Vol 5 (8) ◽  
pp. 990-996 ◽  
Author(s):  
Nukman Yusoff ◽  
Saiful Rizal Ismail ◽  
Azuddin Mamat ◽  
Aznijar Ahmad-Yazi

2008 ◽  
Vol 46 (10) ◽  
pp. 777-784 ◽  
Author(s):  
B.S. Yilbas ◽  
C. Karatas ◽  
I. Uslan ◽  
O. Keles ◽  
Y. Usta ◽  
...  

Optik ◽  
2019 ◽  
Vol 184 ◽  
pp. 103-114 ◽  
Author(s):  
Elyas Haddadi ◽  
Mahmoud Moradi ◽  
Ayub Karimzad Ghavidel ◽  
Ali Karimzad Ghavidel ◽  
Saleh Meiabadi

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Raathai Molian ◽  
Pranav Shrotriya ◽  
Pal Molian

The traditional “evaporation∕melt and blow” mechanism of CO2 laser cutting of aluminum nitride (AlN) chip carriers and heat sinks suffers from energy losses due to its high thermal conductivity, formation of dross, decomposition to aluminum, and uncontrolled thermal cracking. In order to overcome these limitations, a thermochemical method that uses a defocused laser beam to melt a thin layer of AlN surface in oxygen environment was utilized. Subsequent solidification of the melt layer generated shrinkage and thermal gradient stresses that, in turn, created a crack along the middle path of laser beam and caused material separation through unstable crack propagation. The benefits associated with thermal stress fracture method over the traditional method are improved cut quality, higher cutting speed, and lower energy losses.


Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3839
Author(s):  
Ray Tahir Mushtaq ◽  
Yanen Wang ◽  
Mudassar Rehman ◽  
Aqib Mashood Khan ◽  
Mozammel Mia

Carbon dioxide (CO2) laser cutting finds one of its most relevant applications in the processing of a wide variety of polymeric materials like thermoplastics and thermosetting plastics. Different types of polymeric materials like polypropylene (PP), polymethyl methacrylate (PMMA), low- and high-density polyethylene (LDPE, HDPE), are processed by laser for different household as well as commercial products in the industry. The reason is their easy availability and economical aspect in the market. The problems associated with laser cutting include heat-affected zone (HAZ) generated on the cut surface, kerf width (KW), surface roughness (SR), dross formation, and striations formation. Furthermore, other related problems include taper cutting for deep parts and high-power consumption. The primary purpose of this work is a comprehensive literature review in CO2 laser cutting of polymeric materials. The influence of parametric variation on the cut quality is also explained. Cut quality in terms of KW, SR, HAZ, dross formation, and striations formation is analyzed by optimizing cutting variables like laser power (PL), cutting speed (CS), assist gas pressure (Pg), pulse frequency, nozzle type and its diameter, and stand-off distance (SOD). The effects of the laser cutting on the properties of different thermoplastics/thermosetting materials are also reported. However, this topic requires further studies on exploring the range of polymeric materials, and their optimal parameters selection to improve the cut quality. Therefore, the research gaps and future research directions are also highlighted in the context of CO2 laser cutting for polymeric materials.


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