Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Wookjin Lee"'
Publikováno v:
Heliyon, Vol 10, Iss 8, Pp e29666- (2024)
Additive manufacturing technology has advanced beyond creating optimized features, from strengthening materials to make them lightweight to fabricating multi-material combinations that offer functionalities beyond the capabilities of individual mater
Externí odkaz:
https://doaj.org/article/6cfd9607e0114d968a05c3e9f0a7d051
Publikováno v:
Micromachines, Vol 15, Iss 2, p 176 (2024)
This study investigates the effects of laser deposition and laser rescanning (LR) on the microstructure and mechanical properties of high-manganese steel (HMnS) deposited by laser-directed energy deposition (L-DED) comprising 24 wt.% Mn. Four types o
Externí odkaz:
https://doaj.org/article/7f81f80e4d4046578a3aa49659520cd3
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:
Journal of Materials Research and Technology, Vol 14, Iss , Pp 2782-2788 (2021)
The phase transformation behavior from metastable bcc-δ to fcc-γ in Fe–Mn–Si based shape memory alloy processed by laser powder bed fusion was investigated. Primary δ phase formed in this alloy due to the rapid cooling and fast solidification.
Externí odkaz:
https://doaj.org/article/64658b42fd0c466b8b47b586cf333d2a
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
Publikováno v:
Micromachines, Vol 13, Iss 11, p 1977 (2022)
Laser powder bed fusion (LPBF) is a promising additive-manufacturing process for metallic materials. It has the advantage of flexibility in product design, such that various mechanical parts can be fabricated. However, because metal parts are built-u
Externí odkaz:
https://doaj.org/article/17dd20be188a4c448f9e98d2e982ef2e
Publikováno v:
Materials, Vol 15, Iss 18, p 6336 (2022)
Alloy parts produced by an additive manufacturing method with rapid heat transfer from fast melting and solidification have different microstructures, characteristics, and performances compared with materials made by the conventional process. In this
Externí odkaz:
https://doaj.org/article/05259104792c44a39bbaddbbb2befc2d
Finite Element Analysis of Reinforced Concrete Beams Prestressed by Fe-Based Shape Memory Alloy Bars
Publikováno v:
Applied Sciences, Vol 12, Iss 7, p 3255 (2022)
Prestressing of concrete structures using Fe-based shape memory alloys has been investigated extensively by experiments in the last decade. However, detailed investigations on the stress produced by the Fe-based shape memory alloys and its influence
Externí odkaz:
https://doaj.org/article/edd9a2a06ce744679a6aa7d0de757650
Publikováno v:
Materials, Vol 14, Iss 10, p 2588 (2021)
This study aims to explore the wear performance of maraging 18Ni-300 steel, fabricated via laser powder bed fusion (LPBF). The building direction dependence of wear resistance was investigated with various wear loads and in terms of ball-on-disk wear
Externí odkaz:
https://doaj.org/article/527d1417810a40ec8a0310ada7e74806