Effects of laser irradiations on layers condition in three-layered sheet metals
Publish place: 25th Annual Conference of Mechanical Engineering
Publish Year: 1396
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISME25_049
تاریخ نمایه سازی: 13 شهریور 1396
Abstract:
Stainless-steel SUS430/copper C11000/stainless-steelSUS430 three layered sheets have been exposed to differentnumber of Ytterbium fiber laser irradiations. Fivespecimens are prepared with 0, 10, 20, 30 and 40 laserpasses. The steel and copper layers boundary conditions areevaluated after laser forming and tensile test bymetallography and SEM, respectively. The microstructureof unirradiated SUS430 consists of ferrite and dispersedcarbide particles. Microstructure of specimens with laserirradiation in the HAZ is consisting of martensite andoriented ferrite with smaller grain size. Copper hasmicrostructure of a solid solution of copper containingtwins in all specimens. Boundary of layers of the specimensdoes not show any separation and mixing after laserforming. The reason for this is low penetration depth in thematerial in the HAZ which only includes a small portion ofthe steel layer exposed to the laser. Evaluation of thefracture surface using SEM showed dimples in steel andcopper layers. No separation is found in layers boundary ofthe tensile test specimen.
Keywords:
Multi-layered sheet metal- Laser formingmetallography-SEM
Authors
hamed Delfan Abazari
MSc, Depatment of Mechanical Engineering, University of Birjand, Birjand, Iran
S.M. Hossein Seyedkashi
Assistant Prf. Depatment of Mechanical Engineering, University of Birjand, Birjand, Iran
M Hoseinpour Gollo
Associate Prof. Depatment of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran