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Journal Articles

A New measuring method for elemental ratio and Vickers hardness of metal-oxide-boride materials based on Laser-Induced Breakdown Spectroscopy (LIBS)

Abe, Yuta; Otaka, Masahiko; Okazaki, Kodai*; Kawakami, Tomohiko*; Nakagiri, Toshio

Proceedings of 2019 International Congress on Advances in Nuclear Power Plants (ICAPP 2019) (Internet), 7 Pages, 2019/05

Since the hardness of fuel debris containing boride from B$$_{4}$$C pellet in control rod is estimated to be two times higher as that of oxide, such as UO$$_{2}$$ and ZrO$$_{2}$$, it is necessary to select the efficient and appropriate operation for removal of fuel debris formed in the severe accident of nuclear power plants. We focused on the characteristics of LIBS, an innovative rapid chemical in-situ analysis technology that enables simultaneous detection of B, O, and other metal elements in fuel debris. Simulated solidified melt specimens were obtained in the plasma heating tests (CMMR-0/-2, performed by JAEA) of simulated fuel assembly (ZrO$$_{2}$$ is used to simulated UO$$_{2}$$ pellet, other materials such as stainless steel, B$$_{4}$$C are same as fuel assembly). The LIBS signals of (B/O)/Zr ratio showed good linear relationship with Vickers hardness. This technique can be also applied as in-situ assessment tool for elemental composition and Vickers hardness of metal-oxide-boride materials.

Journal Articles

Laser surface alloying of SUS316 stainless steel with Al-Si; Effect of substrate temperature on structure and properties of modified layer

Zherebtsov, S.*; Maekawa, Katsuhiro*; Hayashi, Terutake*; Futakawa, Masatoshi

JSME International Journal, Series A, 48(4), p.292 - 298, 2005/10

The effect of temperature on the structure and properties of the type 316 stainless steel alloyed with Al-Si has been reported in the present paper. It has been found that four different types of structure are formed in the alloyed zone depending on the temperature of the substrate. These structures differ from each other in phase composition, microhardness and relation to cracking. Hard, crack-free microstructures are formed at temperatures of about 350 and 750 $$^{circ}$$C. Maintaining the temperature of the sample at 350 $$^{circ}$$C a uniform, crack-free layer with a high hardness is produced by laser alloying with an energy density of 0.76 W/mm$$^{2}$$.

JAEA Reports

Journal Articles

Mechanical-property evaluation of thin corroded surface layers of ceramic materials by microindentation technique

Futakawa, Masatoshi; Wakui, Takashi*; Ioka, Ikuo; Eto, Motokuni

Journal of the European Ceramic Society, 20(8), p.1135 - 1143, 2000/05

 Times Cited Count:5 Percentile:53.8(Materials Science, Ceramics)

no abstracts in English

JAEA Reports

None

*; *; ; Aoto, Kazumi

JNC-TY9400 2000-010, 138 Pages, 2000/03

JNC-TY9400-2000-010.pdf:5.15MB

None

JAEA Reports

None

Yamanaka, Shinsuke*; Abe, Kazuyuki

JNC-TY9400 2000-004, 78 Pages, 2000/03

JNC-TY9400-2000-004.pdf:2.39MB

no abstracts in English

Journal Articles

Corrosion resistance evaluation of brittle materials in boiling sulfuric acid

*; Futakawa, Masatoshi; Ioka, Ikuo; Onuki, Kaoru; Shimizu, Saburo; Eto, Motokuni; Oku, Tatsuo*; *

Zairyo, 48(7), p.746 - 752, 1999/07

no abstracts in English

JAEA Reports

None

PNC-TJ8164 96-010, 213 Pages, 1996/03

PNC-TJ8164-96-010.pdf:7.67MB

no abstracts in English

Journal Articles

Correlation between the magnetic and mechanical properties of ferromagnetic structural steels,A533B and SUS410

; *; A.Gilanyi*; Ara, Katsuyuki; Uesaka, Mitsuru*; Miya, Kenzo*

Nippon Oyo Jiki Gakkai-Shi, 20, p.665 - 668, 1996/00

no abstracts in English

Journal Articles

A Nondestructive measuring method for assessment of material degradation in nuclear reactor vessels; Correlation between magnetic properties and material properties of magnetic steels

; *; Ara, Katsuyuki; ; A.Gilanyi*; Uesaka, Mitsuru*; Miya, Kenzo*

MAG-95-138, 0, p.61 - 68, 1995/11

no abstracts in English

JAEA Reports

None

; *; ; Tobita, Noriyuki; Nagai, Shuichiro; ;

PNC-TN8410 91-221, 67 Pages, 1991/08

PNC-TN8410-91-221.pdf:1.75MB

None

JAEA Reports

Oral presentation

Examination of measurement method of the hardness by Laser Induced Breakdown Spectroscopy (LIBS)

Okazaki, Kodai*; Kawakami, Tomohiko*; Abe, Yuta; Otaka, Masahiko; Sato, Ikken

no journal, , 

no abstracts in English

Patent

組成分析方法及び組成分析装置、硬度算出方法及び硬度算出装置

阿部 雄太; 中桐 俊男

川上 智彦*

JP, 2018-199316  Patent licensing information

【課題】金属を主成分とする材料中のO、Bの組成や材料の硬度を非接触で精密に算出できる。 【解決手段】図5の関係より、上記の方法で算出された(B/O)/M値のみからビッカース硬度を推定することは一般的には困難である。しかしながら、試料が図5におけるZを挟んだどちらの領域にあるかを判定することができれば、(B/O)/M値からビッカース硬度を推定することができる。前記の通り、図5におけるZよりも左側の領域はOの組成比が大きい場合であり、Zよりも右側の領域はBの組成比が大きな場合に対応する。このため、前記のO/M値、B/M値に応じてこの試料がどちらの領域に属するかを認識することができる。結局、(B/O)/M値から前記の一次式を用いてビッカース硬度を算出することができる。

19 (Records 1-19 displayed on this page)
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