Microstructure and Mechanical Properties of Pulse Laser Welded Stainless Steel and Aluminum Alloys for Lithium-Ion Cell Casings

Similar joining of highly thermal conductive and optical reflective aluminum alloy A1 3003 and SS alloy SS316 for hermetic sealing of lithium-ion cell casing application has been investigated using Nd：YAG pulsed laser welding. Microstructural investigations were carried out to characterize the weldi...

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Bibliographic Details
Published in:材料科学与工程：中英文B版 2016, Vol.6 (5), p.218-225
Main Author: Vallabha Rao Rikka Sumit Ranjan Sahu Rajappa Tadepalli Ravi Bathe Thyagarajan Mohan Raju Prakash Gade Padmanabham Raghavan Gopalan
Format: Article
Language:Chinese
Subjects:
316L不锈钢
光学显微镜
扫描电子显微镜
电池外壳
组织性能
脉冲激光焊接
铝合金
锂离子电池
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Summary:Similar joining of highly thermal conductive and optical reflective aluminum alloy A1 3003 and SS alloy SS316 for hermetic sealing of lithium-ion cell casing application has been investigated using Nd：YAG pulsed laser welding. Microstructural investigations were carried out to characterize the welding zone interface by optical microscopy and scanning electron microscopy. Industrial X-ray 3D computed tomography was carried out on the welding zone to identify the defects such as spatters, gas voids, recast and tapers. It was found that spatters exist in weld zone of SS316L lid and case and show higher hardness （HV 200-210） in the weld area compared to the base metal （HV-175-10） due to fine-grained microstructure. In the case of AI 3003, the laser welding parameters were optimized to obtain 100% joint efficiency with defect free weld zone, and the hardness behavior was dictated by grain size and annealing effects. Furthermore, the welded casings of the cylindrical cells of Li-ion battery were subjected to He-lea
ISSN:2161-6221