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Cracking in Be/Al Nd: YAG laser weld

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Abstract

An investigation was conducted to determine the cause of weld cracking in laser Be/Al weldments. In agreement with earlier studies, features consistent with hot shortness cracking on the fracture surfaces were observed. Closer examinations of the fusion zone crack regions reveal that the cracking was a result of thermal stress, shape of weld roots and impurities segregation. The defects are related to the weld parameters. The cracks easily nucleate at conduction mode weld and blowholes easily appear at keyhole mode weld.

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Acknowledgements

The authors would like to acknowledge the financial supports by National natural science foundation of china (NNSFC) granted No. 10176002, 50571018, and 50431030, the authors are grateful for the helpful discussion with Prof. Zhou XL.

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Authors and Affiliations

  1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China

    G. J. Hao, Y. Zhang, J. P. Lin, Z. Lin, Y. L. Wang & G. L. Chen

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  1. G. J. Hao
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  2. Y. Zhang
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  3. J. P. Lin
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  4. Z. Lin
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  5. Y. L. Wang
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  6. G. L. Chen
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Correspondence to Y. Zhang.

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Hao, G.J., Zhang, Y., Lin, J.P. et al. Cracking in Be/Al Nd: YAG laser weld. J Mater Sci 41, 8308–8312 (2006). https://doi.org/10.1007/s10853-006-1014-7

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  • DOI: https://doi.org/10.1007/s10853-006-1014-7

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