Výsledky vyhledávání - "Kazuo HIRAOKA"

Development of 16Cr8Ni low transformation temperature welding material for optimal characteristics under various dilutions due to all repair welding positions

Autor: Zhongyuan Feng, Ninshu Ma, Kazuo Hiraoka, Yuichi Komizo, Satoru Kano, Masayuki Nagami

A new low transformation temperature (LTT) welding material 16Cr8Ni was developed to satisfy the optimal characteristics in diluted welds due to all repair welding positions. Its good weldability for all welding positions was tested. The measured Ms

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9b69723d2345ada89fe0071361fc2e8

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Elongated bead weld method for improvement of fatigue properties in welded joints of ship hull structures using low transformation temperature welding materials

Autor: K. Kamita, Kazuhiro Hirota, H. Sawato, Tadakazu Tanino, Hidekazu Murakawa, Tsutomu Fukui, Kazuo Hiraoka, Naoki Osawa, T. Sugimura, Seiichiro Tsutsumi, T. Matsuzaki, Chiaki Shiga, Hiroshi Yajima, T. Asoda

Publikováno v: Welding in the World. 61:769-788

To improve the fatigue properties in the welded joints of high strength steels, we developed an elongated bead method for low transformation temperature (LTT) welding materials. The proposed method intensifies the compressive residual stress and redu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::44644b1a2e217a58a61418a9c2e34001
https://doi.org/10.1007/s40194-017-0439-8

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Prediction of residual stresses induced by low transformation temperature weld wires and its validation using the contour method

Autor: Seiichiro Tsutsumi, Kazuo Hiraoka, Hidekazu Murakawa, Ramy Gadallah

Publikováno v: Marine Structures. 44:232-253

Welding residual stresses are one of the main factors influencing the engineering properties of welded structures, and should be taken into account during designing and manufacturing products such as ships, bridges, etc. Recently, both computational

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0ad2fae064686567a4cfe07ec87be79d
https://doi.org/10.1016/j.marstruc.2015.10.002

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Analysis of Retained Austenite and Residual Stress Distribution in Ni-Cr Type High Strength Steel Weld by Neutron Diffraction

Autor: Harley D. Skorpenske, Kazuo Hiraoka, Tadashi Kasuya, Ke An, Hiroshige Inoue, Nobuyuki Ishikawa, Hitoshi Sueyoshi

Publikováno v: Materials Science Forum. :2115-2119

Prevention of weld cracking is necessary for ensuring the reliability of high strength steel structures. Tensile residual stress in the weld metal is one of the major factors causing the weld cracking, therefore, it is important to clarify the residu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d97814c5b3d14e36d7a723903005bf9c
https://doi.org/10.4028/www.scientific.net/msf.783-786.2115

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Validity of strain-induced martensite transformation in enhancing fracture behavior of Cr–Ni weld metal at different temperatures and in different stress states

Autor: Hai Qiu, Kazuo Hiraoka, Hong Zuo, L.N. Wang

Publikováno v: Materials Science and Engineering: A. 586:93-99

The validity of strain-induced martensite transformation (SIMT) in enhancing fracture behavior of Cr–Ni weld metal is related to temperature and stress state. Its valid range with respect to the two parameters is given. When brittle fracture is par

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c612b5c863e568d987bb718a085b0b3c
https://doi.org/10.1016/j.msea.2013.08.022

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Fatigue improvement in high-strength steel welded joints with compressive residual stress

Autor: Ei-Ichi Murakawa, Chiaki Shiga, Kazuo Hiraoka, Uusuke Ohsuga, Koichi Yasuda, Yuki Matsuo, Yasushi Morikage

Publikováno v: Welding in the World. 58:55-64

In order to improve fatigue properties of gusset fillet welded joints in high-strength steels, intensification of compressive residual stress around the weld toe was studied using computer simulations of welded joints with low transformation temperat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ff5dbc19f8f0a4fd10d84953ad1a9a33
https://doi.org/10.1007/s40194-013-0093-8

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Enhancement of fracture toughness of high-strength Cr–Ni weld metals by strain-induced martensite transformation

Autor: Hai Qiu, Hong Zuo, L.N. Wang, J.G. Qi, Kazuo Hiraoka

Publikováno v: Materials Science and Engineering: A. 579:71-76

The effect of strain-induced martensite transformation from retained austenite was investigated on the fracture toughness of Cr–Ni weld metal, in terms of crack tip opening displacement, within the range of room temperature to 77 K. Strain-induced

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3b6cacc43e16a66053a96447ad742834
https://doi.org/10.1016/j.msea.2013.05.012

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