MICROSTRUCTURE AND FRACTURE TOUGHNESS OF 316L HIGH NITROGEN WELD METAL PRODUCED BY HIGH-PRESSURE NITROGEN ARC WELDING(Materials, Metallurgy & Weldability)
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概要
- 論文の詳細を見る
Austenitic stainless steel of SUS316L was welded by the GMA process in high-pressure nitrogen atmospheres up to 6. 1MPa (60atm). The fracture toughness of the weld metals was measured by means of the Charpy impact test at test temperature in the range from 77K to 290K The influence of nitrogen content and microstructure on the toughness of the weld metal has been investigated. The content of nitrogen of GMA weld metal reached about 6700ppm at the maximum welding pressure of 6.1MPa. The Vickers's hardness level increased from 225HV to 350HV with increasing nitrogen content up to 4000ppm. When the nitrogen content exceeded about 5000ppm, grain boundary fracture was easily caused by Cr_2N precipitation.
- 大阪大学の論文
著者
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Hidayat Irwan
Akita University
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KIKUCHI Yasushi
Osaka University
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KAMIYA Osamu
Anjo Kosei Hospital
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Kamiya O
Akita Univ.
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Kamiya Osamu
The Department Of Internal Medicine Anjo Kosei Hospital
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Kamiya Osamu
Akita University
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Kumagai Kazuo
Akita University
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