Zobrazeno 1 - 10
of 192
pro vyhledávání: '"Michiaki Yamasaki"'
Publikováno v:
Journal of Magnesium and Alloys, Vol 12, Iss 7, Pp 2952-2966 (2024)
The fracture toughness of extruded Mg-1Zn-2Y (at. %) alloys, featuring a multimodal microstructure containing fine dynamically recrystallized (DRXed) grains with random crystallographic orientation and coarse-worked grains with a strong fiber texture
Externí odkaz:
https://doaj.org/article/86e43b06b35e41f4a8506cfe20790aae
Autor:
Shin-ichi Inoue, Michiaki Yamasaki, Mitsuru Ohata, Shigeki Kakiuchi, Yoshihito Kawamura, Hidenori Terasaki
Publikováno v:
Journal of Advanced Joining Processes, Vol 9, Iss , Pp 100221- (2024)
Friction-stir (FS) welding was used for the first time to successfully join Mg–Zn–Y–Al–La alloy extrusions containing the long-period stacking ordered (LPSO) phase. Plastic flow produced fine α-Mg grains of sizes 2.0–2.5 μm with random or
Externí odkaz:
https://doaj.org/article/c33efeb544254cfcaa5b9357fbd0b2c8
Autor:
Toko Tokunaga, Koji Hagihara, Michiaki Yamasaki, Tsuyoshi Mayama, Kazuki Yamamoto, Hiroki Narimoto, Taiki Kida, Yoshihito Kawamura, Takayoshi Nakano
Publikováno v:
Science and Technology of Advanced Materials, Vol 23, Iss 1, Pp 752-766 (2022)
The variation in the mechanical properties with the volume fraction of the long-period stacking ordered (LPSO) phase in directionally solidified (DS) Mg/LPSO two-phase alloys was examined. Unexpectedly, the yield stress of the DS alloys increases non
Externí odkaz:
https://doaj.org/article/0077ddfdfea14664ae9874e3c82aa55d
Publikováno v:
Journal of Magnesium and Alloys, Vol 10, Iss 9, Pp 2433-2445 (2022)
The mechanisms of multimodal microstructure evolution and the effects of microstructural factors on mechanical properties must be elucidated to design new alloys with superior properties. In this study, high-fracture-toughness and ductile Mg96.75Zn0.
Externí odkaz:
https://doaj.org/article/d3016710e5d547c6acba2efcecd635ed
Quantitative estimation of kink-band strengthening in an Mg–Zn–Y single crystal with LPSO nanoplates
Autor:
Koji Hagihara, Ryohei Ueyama, Toko Tokunaga, Michiaki Yamasaki, Yoshihito Kawamura, Takayoshi Nakano
Publikováno v:
Materials Research Letters, Vol 9, Iss 11, Pp 467-474 (2021)
Kink-band strengthening was first quantitatively evaluated using an Mg–Zn–Y single crystal containing long-period stacking ordered (LPSO) nanoplates. The ability of a kink-band boundary to act as a barrier that hinders the motion of dislocations
Externí odkaz:
https://doaj.org/article/c9f241e281de4da083f07904f159197d
Autor:
Kristián Máthis, Daria Drozdenko, Gergely Németh, Stefanus Harjo, Wu Gong, Kazuya Aizawa, Michiaki Yamasaki, Yoshihito Kawamura
Publikováno v:
Frontiers in Materials, Vol 6 (2019)
Deformation behavior of two Mg–Zn–Y magnesium alloys, having a different fraction of the long-period-stacking-ordered (LPSO) phase, has been investigated at room temperature and 200°C by a combination of in-situ neutron diffraction (ND) and acou
Externí odkaz:
https://doaj.org/article/2b82ae68234a4d26b64d17cd9307c296
Autor:
Daria Drozdenko, Michiaki Yamasaki, Kristián Máthis, Patrik Dobroň, Pavel Lukáč, Naoya Kizu, Shin-ichi Inoue, Yoshihito Kawamura
Publikováno v:
Materials & Design, Vol 181, Iss , Pp - (2019)
The presented work is focused on the investigation of dilute Mg-Zn-Y alloys prepared by the consolidation of rapidly solidified ribbons. Particularly, the influence of both amount of the Zn and Y alloying elements (varies between 1 and 2 at.%) and th
Externí odkaz:
https://doaj.org/article/89d3ee725e604c37a7460e22c13e6e56
Autor:
Daria Drozdenko, Michiaki Yamasaki, Kristián Máthis, Patrik Dobroň, Shin-ichi Inoue, Yoshihito Kawamura
Publikováno v:
Materials, Vol 14, Iss 24, p 7828 (2021)
This work was focused on revealing the relation between the microstructure and corrosion dynamics in dilute Mg97.94Zn0.56Y1.5 (at.%) alloys prepared by the consolidation of rapidly solidified (RS) ribbons. The dynamics of the corrosion were followed
Externí odkaz:
https://doaj.org/article/a740df5f34944638a9b517ee00d11f03
Autor:
Atsuki Yokota, Masafumi Matsushita, Naruhito Geshi, Daiki Yamasaki, Toru Shinmei, Michiaki Yamasaki, Yoshihito Kawamura
Publikováno v:
Metals, Vol 11, Iss 7, p 1031 (2021)
As-cast Mg97Zn1Y2 alloy consists of α-Mg matrix and 18R-type long-period stacking-ordered (LPSO) structures. We observed that the alloy undergoes a phase transformation to D03 superlattices and α-Mg matrix due to high-pressure high-temperature (HPH
Externí odkaz:
https://doaj.org/article/8da4b3cbc614495d93a910bd391e243c
Autor:
Koji Hagihara, Toko Tokunaga, Kazuki Yamamoto, Michiaki Yamasaki, Tsuyoshi Mayama, Takumi Shioyama, Yoshihito Kawamura, Takayoshi Nakano
Publikováno v:
MATERIALS TRANSACTIONS. 64:720-729