Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Kyeongsik Ha"'
Autor:
Young Keun Park, Kyeongsik Ha, Ki Chang Bae, Kwang Yong Shin, Ki Yong Lee, Do-sik Shim, Wookjin Lee
Publikováno v:
Journal of Materials Research and Technology, Vol 19, Iss , Pp 3484-3497 (2022)
This study investigates the wear resistance of an Fe–12Mn–5Cr–1Ni-0.4C (high-manganese steel) produced by direct energy deposition (DED) and spheroidal graphite cast iron. The high-manganese steel was deposited on the spheroidal graphite cast i
Externí odkaz:
https://doaj.org/article/777258d50aed412092dd468d5232ca55
Publikováno v:
Journal of Materials Research and Technology, Vol 15, Iss , Pp 5554-5568 (2021)
In this work, effect of sample size on mechanical properties in the net-shaped 316 L alloys produced by laser powder bed fusion (LPBF) was studied. Tensile specimens with four different geometries, having the same total cross-sectional areas but with
Externí odkaz:
https://doaj.org/article/d6f0290107c64ebab15a2512d1db4b1b
Publikováno v:
Applied Sciences, Vol 13, Iss 11, p 6572 (2023)
In laser powder bed fusion, process-inherited thermal residual stress is developed due to the thermal strain misfit between each layer. Detailed analysis and a prediction of the residual stress are needed because it can induce distortions of the comp
Externí odkaz:
https://doaj.org/article/483860b0105c4b5aab8adbc741eb85e2
Autor:
Dohyung Kim, Taehwan Kim, Kyeongsik Ha, Jeong-Jung Oak, Jong Bae Jeon, Yongho Park, Wookjin Lee
Publikováno v:
Metals, Vol 10, Iss 3, p 410 (2020)
18Ni-300 maraging steel produced by the selective laser melting (SLM) process has a unique microstructure that is different from that of the same alloy processed by conventional methods. In this paper, maraging steels were fabricated by the selective
Externí odkaz:
https://doaj.org/article/51b78c27e36e43a3b8eccd897b6495ea
Autor:
Kyeongsik Ha, Young Hoon Moon, Tae Hwan Kim, Gyeong Yun Baek, Ki Yong Lee, Do-sik Shim, Wookjin Lee
Publikováno v:
Metals and Materials International. 29:1399-1420
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::807d20de22fbd6c71a352187a0807a21
https://doi.org/10.1007/s12540-022-01293-7
https://doi.org/10.1007/s12540-022-01293-7
Publikováno v:
Journal of Materials Research and Technology, Vol 15, Iss, Pp 5554-5568 (2021)
In this work, effect of sample size on mechanical properties in the net-shaped 316 L alloys produced by laser powder bed fusion (LPBF) was studied. Tensile specimens with four different geometries, having the same total cross-sectional areas but with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d128f25c2fa0d4b16aa314d18c4190fe
https://doi.org/10.1016/j.jmrt.2021.11.034
https://doi.org/10.1016/j.jmrt.2021.11.034
Autor:
Gyeong Yun Baek, Do-Sik Shim, Kyeongsik Ha, Taehwan Kim, Wookjin Lee, Jong Bae Jeon, Young Keun Park, Young Hoon Moon
Publikováno v:
Korean Journal of Metals and Materials. 58:680-692
This study aimed to investigate the wear performance of laser direct energy deposited Fe-8Cr3V-2Mo-2W alloy under various wear environments, in terms of different heat treatment conditions. Ball on disk tribology tests were performed using high-carbo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ea17825efc1cd4c862df51bc684ae45
https://doi.org/10.3365/kjmm.2020.58.10.680
https://doi.org/10.3365/kjmm.2020.58.10.680
Publikováno v:
The International Journal of Advanced Manufacturing Technology. 105:309-323
The stress development behavior during an additive manufacturing process was investigated by experiments and numerical finite element models. The particular manufacturing process examined was a laser powder bed fusion of AISI 316L stainless steel. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa6e2a40be1f3bab61040c10fd1e432a
https://doi.org/10.1007/s00170-019-04204-0
https://doi.org/10.1007/s00170-019-04204-0
Publikováno v:
Materials Letters. 275:128161
The effect of feature size dependence on the mechanical properties of selectively laser-melted 316L stainless steel was studied. It was found that the smaller the feature produced by selective laser melting, the higher is the mechanical strength. Con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f83c91db55d7b46c3cc80d4b33733838
https://doi.org/10.1016/j.matlet.2020.128161
https://doi.org/10.1016/j.matlet.2020.128161
Autor:
Kyeongsik Ha, Jong Bae Jeon, Gyeong Yun Baek, Young Hoon Moon, Wookjin Lee, Taehwan Kim, Do-Sik Shim
Publikováno v:
Additive Manufacturing. 34:101245
The additive manufacturing of metals and ceramics generally uses a concentrated laser heat source to form a local melt pool that moves quickly during the process. The material is deposited by fast cooling and progressive solidification. In this study
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f2fb464e738a022859a47a11e472d52
https://doi.org/10.1016/j.addma.2020.101245
https://doi.org/10.1016/j.addma.2020.101245