Journal of High Pressure Institute of Japan
Online ISSN : 1347-9598
Print ISSN : 0387-0154
ISSN-L : 0387-0154
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Volume 29, Issue 6
Displaying 1-6 of 6 articles from this issue
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  • Design of High Pressure Apparatus to Use at High Magnetic Field and Low Temperature
    Yoshiya UWATOKO, Gendo OOMI
    1991 Volume 29 Issue 6 Pages 318-326
    Published: November 25, 1991
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.29.318
    JOURNAL FREE ACCESS
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    High pressure apparatus has been designed to measure the electrical and magnetic properties of condensed matters. It is shown that this apparatus can be used at least up to 24kbar and 5 tesla at low temperature down to ca. 2K. Application of this apparatus to measure the thermal expansion, electrical resistivity, magnetostriction and magnetoresistance is briefly described.
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  • Cr-W low alloy heat-resisting steels
    Yasuo OTOGURO, Isao ITOH, Katsuo SAITOH, Noboru YAGI, Shunji KUMAGAI
    1991 Volume 29 Issue 6 Pages 327-334
    Published: November 25, 1991
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.29.327
    JOURNAL FREE ACCESS
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    Characteristics such as high temperature strength, toughness, and weldability were investigated with low activation Cr-W-V-Ta steels.
    All steels whose tensile strength was adjusted to about 637MPa showed good ductility and toughness.
    Absorbed energies at 0°C were more than 196J and shear fraction values of the fractured surfaces were nearly 100%. No steels were embrittled after extended heating at 575°C.
    Microstructure of the steel except a 8 Cr-2W-0.25V-Ta steel was tempered bainite and grain size was markedly fine (ASTM No. 7-8).
    Creep rupture strength of some steels was equal to or higher than that of the advanced Cr-Mo steels for oil refinery equipments.
    According to the results of the JIS maximum hardness test, as welded hardness of a 2.25Cr-2W-0.4V-Ta steel was almost same as that of a 1.25Cr-0.5Mo steel. Required preheating temperature for preventing cracks was 175°C in the y groove crack test.
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  • Fracture Toughness of TMCP-Manufactured Steel Plate for Cryogenic LPG Tank Application and Its Evaluation
    Hiroshi YAJIMA, Masuo TADA, Masato ZAMA, Yoshiaki INOUE, Daisuke SAKAI ...
    1991 Volume 29 Issue 6 Pages 335-340
    Published: November 25, 1991
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.29.335
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    The full exploitation of the newly TMCP technology by five leading Japanese steel manufacturers to produce a new NK KL33-class high-toughness, low-temperature steel plate to the requirements specified by Mitsubishi Heavy Industries resulted in the development of the LPG tank material excellent in fracture toughness for practical application to both land and marine installations.
    This report summarizes comprehensive studies made of the newly developed cryogenic LPG tank steel plate, which confirmed a high level of unstable brittle crack propagation arrest capability and excellent fracture toughness it would offer as the base plate and the latter property can be ensured specifically for the high-heat-input welded joint produced in it. It was confirmed also that the LPG tanks fabricated in the newly developed steel plate could ensure high levels of safety and reliability.
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  • Brittle Fracture Characteristics of Heavy Thickness 9% Ni Steel Plate and its Applicability to Large Scale LNG Storage Tanks
    Susumu MACHIDA, Noriyoshi ISHIKURA, Naoshige KUBO, Norihiko KATAYAMA, ...
    1991 Volume 29 Issue 6 Pages 341-355
    Published: November 25, 1991
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.29.341
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    To cope with the demand of constructing large-scale LNG storage tanks, heavy thickness 9% Ni steel plates were developed by taking special account of chemical compositions and heat treatment. In order to assess its applicability to LNG storage tank of 140, 000kl in capacity, properties of base plates (38-45mm, mainly 40mm in thickness) and their welded joints were studied mainly from the brittle fracture initiation and arrest characteristics, using small-scale and large-scale fracture toughness testings. GTAW, SAW and SMAW methods were applied for the tests with using 70% Ni-alloy type welding materials.
    Required fracture toughness for base metal and welded joint was discussed from the view point of not only the prevention of brittle fracture initiation, but also brittle crack arrest. Furthermore, corelations between Kca value and Charpy absorbed energy, Kca value and DT absorbed energy were proposed considering the effect of plate thickess.
    All the test results cleared those proposed required values with a wide margin, and the safety against brittle fracture initiation and propagation was fully confirmed through large scale tests.
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  • [title in Japanese]
    Osamu OKAWA
    1991 Volume 29 Issue 6 Pages 356-362
    Published: November 25, 1991
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.29.356
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  • Variety and Actvities of Research Committee of HPI in 1990
    1991 Volume 29 Issue 6 Pages 363-372
    Published: November 25, 1991
    Released on J-STAGE: August 05, 2010
    DOIhttps://doi.org/10.11181/hpi1972.29.363
    JOURNAL FREE ACCESS
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