Abstract
304 stainless steel parts of single pass were fabricated by wire and arc additive manufacturing using gas tungsten arc welding (TIG) and ultrasonic micro-forging . The microstructure and microhardness were studied at different powers of ultrasonic micro-forging . The relationship between microhardness and power of ultrasonic micro-forging was established. It was found that the parts were well formed and no defects such as micro-cracks or pores were observed. Different thermal histories resulted in various microstructures . The microstructure of parts was fined by the treatment of ultrasonic micro-forging . The microhardness of the parts was also enhanced by the treatment of ultrasonic micro-forging while declined from the top to the bottom of the fabrications. When the power of ultrasonic micro-forging was fixed at 1000 W, the depth of action from ultrasonic micro-forging comes to about 1 mm and the maximum of microhardness reached to 350 HV0.1.
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Acknowledgements
This paper is funded by the International Exchange Program of Harbin Engineering University for Innovation-oriented Talents Cultivation. The authors would like to thank Professor Jiang for his guidance in additive manufacturing and ultrasonic micro-forging fields while especially thank for the support from Material Science and Chemical Engineering Department of Harbin Engineering University.
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© 2019 The Minerals, Metals & Materials Society
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Sun, L., Jiang, F., Yuan, D., Sun, X., Su, Y., Guo, C. (2019). Effects of Ultrasonic Micro-forging on 304 Stainless Steel Fabricated by WAAM. In: TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05861-6_22
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DOI: https://doi.org/10.1007/978-3-030-05861-6_22
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