Multi-layer welded 2.25Cr-1Mo steel: creep-rupture properties and HAZ microstructure of large joints

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作者：
Natl Res. Inst for Metals, Tsukuba, Japan [1 ]
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来源：
Zairyo | / 4卷 / 430-436期
关键词：
Crack initiation - Creep - Creep testing - Fracture - Heat affected zone - Joints (structural components) - Metallographic microstructure - Multilayers - Stresses - Welding - Welds;
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摘要：
This report discusses the investigation of creep-rupture properties of welded joints of 2.25Cr-1Mo steel. In the investigation, both small round bar and full-thickness (50 mm) specimens were prepared from the joints fabricated by multi-layer welding. The creep-rupture testing was conducted at 550°C, using stresses in the range of 78 - 159 MPa. Through detailed observation, the location and mode of fracture in the specimens with different geometries of the welded joint were determined.
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