Mathoho, IpfiAkinlabi, ETArthur, Nana KKTlotleng, MonnammeMasina, Bathusile N2021-07-092021-07-092019-03Mathoho, I., Akinlabi, E., Arthur, N.K., Tlotleng, M. & Masina, B.N. 2019. Metallurgical characteristics of laser peened 17-4 PH SS processed by LENS technique. http://hdl.handle.net/10204/12041 .978-3-030-05860-9978-3-030-05861-6https://doi.org/10.1007/978-3-030-05861-6_25http://hdl.handle.net/10204/12041This study investigated the effect of laser peening on the surface integrity (surface roughness, microstructure and microhardness) of 17-4 PH stainless steel components which were built through the direct energy deposition (DED). Additive manufacturing (AM) technique was performed on laser engineered net shaping (LENS) system. Components were built through the same energy density of 312.9 J/mm3 and subsequently subjected to laser peening so as to modify the surface of the material. However, one component was peened for three cycles and the other one for six cycles. The current study discovered that the surface roughness improved by 28% for three cycles of peening and 42% for six cycles of peening. Moreover, it was found that laser peening caused deformation of grains just below the peened surface which consequently resulted in increment of microhardness.Abstracten17-4 PH SSLENSMicrohardnessMicrostructureSurface roughnessConference PresentationMathoho, I., Akinlabi, E., Arthur, N. K., Tlotleng, M., & Masina, B. N. (2019). Metallurgical characteristics of laser peened 17-4 PH SS processed by LENS technique. http://hdl.handle.net/10204/12041Mathoho, Ipfi, ET Akinlabi, Nana KK Arthur, Monnamme Tlotleng, and Bathusile N Masina. "Metallurgical characteristics of laser peened 17-4 PH SS processed by LENS technique." <i>Proceedings of the TMS 148th Annual Meeting & Exhibition, San Antonio, Texas, 10-14 March 2019</i> (2019): http://hdl.handle.net/10204/12041Mathoho I, Akinlabi E, Arthur NK, Tlotleng M, Masina BN, Metallurgical characteristics of laser peened 17-4 PH SS processed by LENS technique; 2019. http://hdl.handle.net/10204/12041 .TY - Conference Presentation AU - Mathoho, Ipfi AU - Akinlabi, ET AU - Arthur, Nana KK AU - Tlotleng, Monnamme AU - Masina, Bathusile N AB - This study investigated the effect of laser peening on the surface integrity (surface roughness, microstructure and microhardness) of 17-4 PH stainless steel components which were built through the direct energy deposition (DED). Additive manufacturing (AM) technique was performed on laser engineered net shaping (LENS) system. Components were built through the same energy density of 312.9 J/mm3 and subsequently subjected to laser peening so as to modify the surface of the material. However, one component was peened for three cycles and the other one for six cycles. The current study discovered that the surface roughness improved by 28% for three cycles of peening and 42% for six cycles of peening. Moreover, it was found that laser peening caused deformation of grains just below the peened surface which consequently resulted in increment of microhardness. DA - 2019-03 DB - ResearchSpace DP - CSIR J1 - Proceedings of the TMS 148th Annual Meeting & Exhibition, San Antonio, Texas, 10-14 March 2019 KW - 17-4 PH SS KW - LENS KW - Microhardness KW - Microstructure KW - Surface roughness LK - https://researchspace.csir.co.za PY - 2019 SM - 978-3-030-05860-9 SM - 978-3-030-05861-6 T1 - Metallurgical characteristics of laser peened 17-4 PH SS processed by LENS technique TI - Metallurgical characteristics of laser peened 17-4 PH SS processed by LENS technique UR - http://hdl.handle.net/10204/12041 ER -22298