Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Hiroaki Ohfuji"'
Autor:
Hiroaki Kurishita, Hiroyuki Ishizaki, Hun Chea Jung, Koichi Niikura, Masahiro Onoi, Yutaka Nagasawa, Shunsuke Makimura, Tatsuaki Sakamoto, Hiroaki Ohfuji, Atsuro Kimura
Publikováno v:
Materials Science Forum. 1024:103-109
Tungsten (W) is a principal candidate as target material because of its high density and extremely high melting point. W inherently has a critical disadvantage of its brittleness at around room temperature (low temperature brittleness), recrystalliza
Autor:
Naoya Yamamoto, Fumitaro Ishikawa, Yohei Murakami, Toru Shinmei, Rei Fukuta, Tetsuo Irifune, Hiroaki Ohfuji
Publikováno v:
MATERIALS TRANSACTIONS. 61:1707-1710
Autor:
Masafumi Matsushita, Ryohei Waki, Michiaki Yamasaki, Kohtaro Masuda, Yuji Higo, Yoshihito Kawamura, Hiroaki Ohfuji
Publikováno v:
Journal of Alloys and Compounds. 784:1284-1289
Under high-temperature and high-pressure conditions, the long-period stacking-ordered structure in Mg85Y9Zn6 transforms to a dual-phase structure consisting of a hexagonal close-packed lattice and a face-centered cubic lattice. After further solidifi
Publikováno v:
Materials Science and Engineering: A. 748:428-433
Microstructure and yield strength at room temperature and 300 °C in Al-5 wt%Y2O3 and Al-5 wt%La2O3 fabricated by mechanical alloying (MA) have been investigated by transmission electron microscopy and compression test. Al-5 wt%Y2O3 and Al-5 wt%La2O3
Autor:
Li Lei, Leilei Zhang, Shangpan Gao, Simon A. T. Redfern, Bo Chen, Xiping Chen, Duanwei He, Xianlong Wang, Qiwei Hu, Leiming Fang, Yuanhua Xia, Yohei Kojima, Hiroaki Ohfuji, Tetsuo Irifune, Zhi Zeng
Publikováno v:
Journal of Alloys and Compounds. 752:99-105
Binary ε-Fe 3 N 1.098 and ternary ε-Fe 2.322 Co 0.678 N 0.888 were synthesized as spherical bulk materials using novel high-pressure solid-state metathesis reactions (HPSSM). The structural and magnetic properties of the two nitrides were investiga
Publikováno v:
Journal of the Society of Materials Science, Japan. 67:568-573
Publikováno v:
Journal of Japan Institute of Light Metals. 67:361-366
Autor:
Michiaki Yamasaki, Masahiro Fukuda, Masafumi Matsushita, Hiroaki Ohfuji, Teruki Tsuchiya, Yoshihito Kawamura
Publikováno v:
Journal of Alloys and Compounds. 844:155972
A Mg80Yb12Cu8 (CY) phase was found in a Mg97Yb2Cu1 alloy quenched after being annealed at 873 K for 10 min; the unit cell dimensions of the CY phase are described as 4 3 × 4 3 × 2 with respect to those of the original hcp-Mg lattice. The a-axis lat
Publikováno v:
Metallurgical and Materials Transactions A. 46:1597-1609
The effects of microstructural characteristics (secondary dendrite arm spacing, SDAS) and Si- and Fe-based eutectic structures on the mechanical properties and failure behavior of an Al-Si-Cu alloy are investigated. Cast Al alloy samples are produced
Autor:
Hiroaki Ohfuji, Takafumi Hiramoto, Tatsuaki Sakamoto, Sengo Kobayashi, Kiyomichi Nakai, Tetsuo Irifune
Publikováno v:
QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY. 33:71s-74s
Whether dislocation network could be introduced into austenite (γ) even during austenitization or not was analyzed by optical microscopy. Austenitization at 1450°C for 300s dissolves MnS completely into γ. It is clarified that isothermal holding a