Wire + Arc Additive Manufacture of 17-4 PH stainless steel: Effect of different processing conditions on microstructure, hardness, and tensile strength

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dc.contributor.authorCaballero, Armando
dc.contributor.authorDing, Jialuo
dc.contributor.authorGaguly, Supriyo
dc.contributor.authorWilliams, Stewart W.
dc.date.accessioned2019-09-02T13:51:09Z
dc.date.available2019-09-02T13:51:09Z
dc.date.issued2019-01-07
dc.description.abstractWire + Arc Additive Manufacture (WAAM) is receiving increasing attention as it offers a way to fabricate meter scale parts, with relatively low capital cost, lower material wastage and logistical advantages. A wide range of metallic alloys could be manufactured using this process. Martensitic grade precipitation-hardening stainless steel 17-4 PH offers excellent combination of high strength and corrosion resistance. Hence, it is important to investigate the behaviour of this alloy in WAAM. In the present work, the effect of different process variables such as shielding gas, deposition path and post-fabrication heat treatment, on microstructure and mechanical properties were studied. A number of specimens were manufactured by WAAM using the Fronius Cold Metal Transfer (CMT) process under different controlled processing conditions. These specimens were subsequently characterized by optical and electron microscopy and mechanical properties in terms of tensile strength and hardness. It was found that using shielding gases that result in higher heat input reduces the amount of retained austenite in the as-deposited microstructure. It has been demonstrated that the required tensile properties can be achieved by applying post-deposition heat treatment. However, it is suggested that direct aging in as deposited condition resulted in formation of harmful intermetallic phases which embrittles the deposit.en_UK
dc.identifier.citationCaballero A, Ding J, Ganguly S. (2019) Williams S. Wire + Arc Additive Manufacture of 17-4 PH stainless steel: Effect of different processing conditions on microstructure, hardness, and tensile strength. Journal of Materials Processing Technology, Volume 268, June 2019, pp. 54-62en_UK
dc.identifier.issn0924-0136
dc.identifier.urihttps://doi.org/10.1016/j.jmatprotec.2019.01.007
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/14501
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAdditive manufactureen_UK
dc.subjectWAAMen_UK
dc.subjectRetained austeniteen_UK
dc.subjectStainless steelen_UK
dc.subject17-4 PHen_UK
dc.titleWire + Arc Additive Manufacture of 17-4 PH stainless steel: Effect of different processing conditions on microstructure, hardness, and tensile strengthen_UK
dc.typeArticleen_UK

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