Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Myeong-heom Park"'
Autor:
Sukyoung Hwang, Hirokazu Kato, Kazuho Okada, Myeong-heom Park, Avala Lavakumar, Reza Gholizadeh, Hiroki Adachi, Masugu Sato, Nobuhiro Tsuji
Publikováno v:
Materials Research Letters, Vol 12, Iss 8, Pp 571-579 (2024)
Ultrafine-grained (UFG) high-Mn austenitic steel exhibited unusual discontinuous yielding on its stress-strain curve, characterized by a yield drop followed by a stress plateau, indicative of Lüders deformation. Utilizing the digital image correlati
Externí odkaz:
https://doaj.org/article/3e5cc0c1d025478f854fd00924ed41d2
Publikováno v:
Journal of Materials Research and Technology, Vol 24, Iss , Pp 3826-3838 (2023)
In the present study, the mechanisms of types B and C serrations in the tensile curves of C-bearing high Mn steel were investigated. Many tensile tests were performed at various temperatures (313–573 K) with two different initial strain rates (ε˙
Externí odkaz:
https://doaj.org/article/57a98eece14f44bba0ffb6b6221e0eb9
Publikováno v:
Journal of Materials Research and Technology, Vol 17, Iss , Pp 2690-2700 (2022)
Metastable austenitic steels having ultrafine grained (UFG) microstructures can be fabricated by conventional cold rolling and annealing processes by utilizing the deformation-induced martensitic transformation during cold rolling and its reverse tra
Externí odkaz:
https://doaj.org/article/af7687dad22a47ceacb89c420e16fc52
Autor:
Yu Bai, Hiroki Kitamura, Si Gao, Yanzhong Tian, Nokeun Park, Myeong-heom Park, Hiroki Adachi, Akinobu Shibata, Masugu Sato, Mitsuhiro Murayama, Nobuhiro Tsuji
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
Abstract Tensile mechanical properties of fully recrystallized TWIP steel specimens having various grain sizes (d) ranging from 0.79 μm to 85.6 μm were investigated. It was confirmed that the UFG specimens having the mean grain sizes of 1.5 μm or
Externí odkaz:
https://doaj.org/article/86bd8bb69e144719add2355a61094a95
Publikováno v:
Frontiers in Materials, Vol 7 (2020)
It is well-known that grain refinement is one of the most effective ways to improve strength of metals without addition of alloying elements. In order to obtain bulky metals having ultrafine grained (UFG) microstructures with average grain sizes smal
Externí odkaz:
https://doaj.org/article/33042716041e457f8cdeaf6e32d1e2cd
Autor:
Si Gao, Takuma Yoshimura, Wenqi Mao, Yu Bai, Wu Gong, Myeong-heom Park, Akinobu Shibata, Hiroki Adachi, Masugu Sato, Nobuhiro Tsuji
Publikováno v:
Crystals, Vol 10, Iss 12, p 1115 (2020)
Intermetallic compounds are usually considered as deleterious phase in alloy designing and processing since their brittleness leads to poor ductility and premature failure during deformation of the alloys. However, several studies recently found that
Externí odkaz:
https://doaj.org/article/d0dac6873ead411daad08491e3d9ad57
Autor:
Avala Lavakumar, Myeong-heom Park, Sukyoung Hwang, Hiroki Adachi, Masugu Sato, Ranjit Kumar Ray, Mitsuhiro Murayama, Nobuhiro Tsuji
Publikováno v:
Materials Science and Engineering: A. 874:145089
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f569a4d4cc4de21e773078a2e8342e6
https://doi.org/10.1016/j.msea.2023.145089
https://doi.org/10.1016/j.msea.2023.145089
Autor:
Hiroki Adachi, Nobuhiro Tsuji, Akinobu Shibata, Yu Bai, Si Gao, Wenqi Mao, Takuma Yoshimura, Myeong-heom Park, Masugu Sato, Wu Gong
Publikováno v:
Crystals
Volume 10
Issue 12
Crystals, Vol 10, Iss 1115, p 1115 (2020)
Volume 10
Issue 12
Crystals, Vol 10, Iss 1115, p 1115 (2020)
Intermetallic compounds are usually considered as deleterious phase in alloy designing and processing since their brittleness leads to poor ductility and premature failure during deformation of the alloys. However, several studies recently found that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6a59044dcc6572edb9908e4811e64a8
Publikováno v:
SSRN Electronic Journal.
The objective of the present study is to clarify the mechanism of dynamic strain aging (DSA) causing serrations in tensile flow curves of Fe-5.15Mn-0.15C-0.37Si-0.0039N (wt%) medium-Mn steel specimens with triple phases of retained austenite (γR), f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bd68bde768cbf7237e91c44d0c4902d
https://doi.org/10.2139/ssrn.3680373
https://doi.org/10.2139/ssrn.3680373
Publikováno v:
Materials Science and Engineering: A. 730:217-222
The bimodal microstructure in Ti-6Al-4V alloy comprised of equiaxed primary α grains and transformed β areas can be regarded as a kind of “dual-phase” structure. In this study, the volume fraction of primary α grains was systematically modifie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b8d64066a5c32d108f5d900d62e1b74
https://doi.org/10.1016/j.msea.2018.06.019
https://doi.org/10.1016/j.msea.2018.06.019