Tailoring of Mechanical Properties of Indirect Hot Stamping Steel Tubes by Laser Assisted Local Rapid Heating
Mahmudun Nabi CHOWDHURY1,Ju��ri KIM1,Sung��tae HONG1,Jin��wook JUNG2,Heung��nam HAN2,Sang��woo SO3
1. School of Mechanical Engineering, University of Ulsan, Ulsan 44610, South Korea 2. Department of Materials Science & Engineering and Centre for Iron & Steel Research, RIAM, Seoul National University, Seoul 08826, South Korea 3. Automotive Parts Institute & Centre, Ulsan Technopark, Ulsan 44412, South Korea
Tailoring of Mechanical Properties of Indirect Hot Stamping Steel Tubes by Laser Assisted Local Rapid Heating
Mahmudun Nabi CHOWDHURY1,Ju��ri KIM1,Sung��tae HONG1,Jin��wook JUNG2,Heung��nam HAN2,Sang��woo SO3
1. School of Mechanical Engineering, University of Ulsan, Ulsan 44610, South Korea 2. Department of Materials Science & Engineering and Centre for Iron & Steel Research, RIAM, Seoul National University, Seoul 08826, South Korea 3. Automotive Parts Institute & Centre, Ulsan Technopark, Ulsan 44412, South Korea
ժҪ The effect of laser assisted local heating on the mechanical properties of a hot stamping steel tube was investigated. A heated region with a spiral shape was generated on the surface of the tube by combining the linear movement of the laser and the rotation of the tube. The results of axial crush tests show that the laser assisted local heating can be effectively used to modify the mechanical performance of the tube. A microstructural analysis confirms that the laser locally induces a martensitic phase transformation in the heated region and results in inhomogeneous microstructures along the length of the tube.
Abstract��The effect of laser assisted local heating on the mechanical properties of a hot stamping steel tube was investigated. A heated region with a spiral shape was generated on the surface of the tube by combining the linear movement of the laser and the rotation of the tube. The results of axial crush tests show that the laser assisted local heating can be effectively used to modify the mechanical performance of the tube. A microstructural analysis confirms that the laser locally induces a martensitic phase transformation in the heated region and results in inhomogeneous microstructures along the length of the tube.
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Mahmudun Nabi Chowdhury
E-mail: noyon.uou@gmail.com
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Mahmudun Nabi CHOWDHURY,Ju��ri KIM,Sung��tae HONG,Jin��wook JUNG,Heung��nam HAN,Sang��woo SO. Tailoring of Mechanical Properties of Indirect Hot Stamping Steel Tubes by Laser Assisted Local Rapid Heating[J]. �й������ڿ���, 2016, 23(9): 949-954.
Mahmudun Nabi CHOWDHURY,Ju��ri KIM,Sung��tae HONG,Jin��wook JUNG,Heung��nam HAN,Sang��woo SO. Tailoring of Mechanical Properties of Indirect Hot Stamping Steel Tubes by Laser Assisted Local Rapid Heating. Chinese Journal of Iron and Steel, 2016, 23(9): 949-954.
2016, Vol. 23 
