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Microstructural aspects of weld repair in 18 nickel 1800 MPA maraging steel

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Abstract

The study of the microstructural aspects of the maraging steel weld repair has become important as this material finds extensive applications in aerospace and other strategic areas. The details available on these at present are very limited. During one of the fabrication trials of a large pressure vessel made of 18 Ni 1800 MPa maraging steel plates, 7.8 mm thick, defects were observed in the welds which were to be repaired. This called for simulated experiments. The microstructural variations observed in the repaired areas were the result of the repeated thermal cycles they had undergone. Based on this microstructural evidence, a new diagram depicting the newly formed weld zones is constructed from which the mechanical properties of the repair welds can be predicted.

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Sree Kumar, K., Natarajan, A., Sinha, P.P. et al. Microstructural aspects of weld repair in 18 nickel 1800 MPA maraging steel. J Mater Sci 27, 3817–3820 (1992). https://doi.org/10.1007/BF00545463

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  • DOI: https://doi.org/10.1007/BF00545463

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