Search Results:　 1-20 of 28

OHJI Tatsuki

… The creep lives, which are mostly governed by facet-sized cavity formation, reasonably follow the Monkman-Grant relation. … Creep resistance of alumina/silicon carbide nanocomposite is markedly improved compared with that of alumina with an equivalent grain size, due to pinning effect of intergranular silicon carbide particles. … The interface between the intergranular particles and the alumina matrix is much stronger than the alumina/alumina interface. …

Journal of the Ceramic Society of Japan 111(1299), 793-799, 2003-11-01

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Ishikawa Manabu , Yamada Kunihiro

… A study has been made on the evaluation of the mechanistic condition for the critical behavior of Quasi-Cleavage (QC) and Intergranular (IG) cracks in the hydrogen charged quenched and tempered ASTM A-490 steel. … SEM fractographic examination revealed that the QC facet can be regarded as the critical length of the Griffith Crack independent of the variety of hydrogen charging condition ; …

Transactions of the Japan Society of Mechanical Engineers. A 59(563), 1631-1635, 1993-07-25

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KATSUMATA Masaaki , TAKAGI Isamu , KAJI Haruo

… Fracture appearance in an overheated Ni-Cr-Mo-V steel for low pressure turbine rotor was characterized as the occurence of intergranular fracture in ductile fracture range. … The facet size of intergranular fracture surface corresponded to the austenite grain size of the steel heated at high temperature during heating before forging. … The facet size was not changed by re-austenitizing treatment such as normalizing and quenching whose temperature was relatively low. …

Tetsu- to- Hagane 76(2), 238-245, 1990-02-01

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OHTANI Ryuichi , KITAMURA Takayuki , MURAYAMA Hideaki , TADA Naoya

… When the resistance become zero or a negative value, the grain boundary was assumed to fracture and to yield an intergranular facet of small crack. …

Transactions of the Japan Society of Mechanical Engineers. A 54(503), 1312-1316, 1988-07-25

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TAJIMA Kiyoshi , KAKIGAWA Hiroshi , KOZONO Yoshio , HAYASHI Ichiro

前報において, クラウン・ブリッジ用Ni-Cr合金の引張強さと伸びは鋳造方法によって大きく変化することを報告した.本報では鋳造方法の違いにより生じた引張特性の変化の原因について検討を加えた.置換アルゴン雰囲気中高周波溶融-吸引加圧鋳造(Ar高周波)を用いた時のみ, 5種類のNi-Cr合金鋳造体の引張強さと硬さとの間に高い相関性が有意に認められた.このことからAr高周波以外の鋳造方法による鋳造体では …

Journal of the Japanese Society for Dental Materials and Devices 5(2), 268-278, 1986-03-25

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YONEZAWA Syunichi , YAMAKAWA Koji , YOSHIZAWA Shiro

… (1) The fractured surfaces of steels having 115, 150 and 170 kg/mm^2 tensile strength revealed almost intergranular, while that of 100 kg/mm^2 steel showed quasicleavage. … (2) The grain size of intergranular facet was almost equal to [that of prior-austenite. … was intergranular. … (4) With increasing hydrogen content, both the crack propagation rate and the percentage of intergranular facet increased. …

Journal of the Society of Materials Science, Japan 33(365), 191-197, 1984-02-15

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ENJO Toshio , KURODA Toshio , MITSUI Noriyuki

… The percentage of intergranular fracture in the fractured surface was highest for the specimen tempered at 300℃. … The fracture morphology of tempered martensite embrittlement was intergranular fracture with flat surface, but the morphology of hydrogen embrittlement was intergranular fracture with tear ridges on the surface. …

Transactions of JWRI 12(2), 227-233, 1983-12-00

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MURAKAMI Ri-ichi , NAKANE Koji , AKIZONO Koichi

… On the other hand, for the near threshold crack growth rates below 5×10^<-9>m/cycle, the striation-like appearance a specified crystallographic plane was mixed with the microstructure sensitive fracture appearance such as cleavage-like mode and intergranular facet. … In particular, the intergranular facets were observed on only the smallest grain size. …

Journal of the Society of Materials Science, Japan 32(355), 389-394, 1983-04-15

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MASUDA Chitoshi , NISHIJIMA Satoshi , SHIMODAIRA Masuo

… g., striation, intergranular or crystallographic decohesion, etc. … The tendency of this evolution was found to be the same, irrespective of base metal or weld metal, as well as for the position of the facet which could be near or deep under the specimen surface. …

Journal of the Society of Materials Science, Japan 30(335), 816-821, 1981-08-15

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