Evaluation of Heusler alloys using spin-polarized positron annihilation spectroscopy

Kawasuso, Atsuo; Maekawa, Masaki; Fukaya, Yuki; Yabuuchi, Atsushi; Mochizuki, Izumi

no journal, , 

Using spin-polarized positron annihilation spectroscopy, we are studying the spin-polarized state associated with the Heusler alloys. We measured the energy spectrum of annihilation rays by placing the samples and a positron source emitting longitudinaly polarized positrons in magnetic field and extracted the components related to the magnetism. The results imply that (1) the majority spin bands of the CMA sample have a d-like character, (2) those of the CMS sample have more sp-like character and (3) those of the NMS sample have the further sp-like character.

Microstructure-mechanical properties correlation in neutron-irradiated modified SUS316 steels, 2

Oka, Hiroshi*; Kubota, Tomoki*; Hashimoto, Naoyuki*; Onuki, Somei*; Yamashita, Shinichiro

no journal, , 

no abstracts in English

Average internal structures of Nd-Fe-B sintered magnets studied by small-angle neutron scattering

Takeda, Masayasu; Suzuki, Junichi*; Akiya, Takahiro*; Kato, Hiroaki*; Une, Yasuhiro*; Sagawa, Masato*

no journal, , 

no abstracts in English

Effect of cyclic temperature variation on the mechanical properties and microstructures in F82H ODS steel irradiated by self-ions

Liu, C.*; Chen, S.*; Hashimoto, Naoyuki*; Onuki, Somei*; Shiba, Kiyoyuki; Jitsukawa, Shiro

no journal, , 

Creep strength and nano-macro structure of high-Cr martensitic steel

Tanno, Takashi; Otsuka, Satoshi; Kaito, Takeji; Yano, Yasuhide; Koyama, Shinichi; Tanaka, Kenya; Oba, Yojiro*; Onuma, Masato*

no journal, , 

The 9Cr-ODS martensitic steel is under development as first candidate material for fast reactor long life fuel cladding. It should have high temperature strength, irradiation resistance and productibility. The 11Cr-ODS steels with additional corrosion resistance by Cr enrichment are also under development. And the evaluation of their applicability for cladding material is in progress. Trial manufacture, creep test and nano/macro structure evaluation of several ODS steels were carried out to modify the chemical composition and manufacturing process of the 11Cr-ODS steel. Uni-axial creep strength of manufactured 11Cr-ODS steels were equal to or higher than that of 9Cr-ODS steel. The strength of 11Cr-ODS steels with 0.3wt% Ti was slightly higher than that with 0.2wt% Ti. The size and number density of dispersed-oxide depended on the amount of added Ti and extra-oxygen.