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Simulation research on heat-affected zone of the NiTi alloy plasma arc welded joints

Simulation research on heat-affected zone of the NiTi alloy plasma arc welded joints
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摘要 In order to study the compositions and properties of NiTi alloy plasma arc welded joints, different temperatures of the heat-affected zone(HAZ) are simulated. Temperatures are set at 20 ℃, 400 ℃, 500 ℃, 600 ℃, 700 ℃, 800 ℃, 900 ℃ and 1 000 ℃. X-ray diffraction results of the thermal simulated specimens show that NiTi2 phase emerges in the alloy when the temperature is between 500 ℃ and 800 ℃, while NiTi2 and Ni3 Ti phases emerge when the temperature is between 800 ℃ and 1 000 ℃. Tensile strengths of specimens at 600 ℃ and 900 ℃ are only 68. 0% and 61.3% of the strength at the room temperature respectively due to the emergence of NiTi2 and Ni3 Ti phases. In order to study the compositions and properties of NiTi alloy plasma arc welded joints, different temperatures of the heat-affected zone(HAZ) are simulated. Temperatures are set at 20 ℃, 400 ℃, 500 ℃, 600 ℃, 700 ℃, 800 ℃, 900 ℃ and 1 000 ℃. X-ray diffraction results of the thermal simulated specimens show that NiTi2 phase emerges in the alloy when the temperature is between 500 ℃ and 800 ℃, while NiTi2 and Ni3 Ti phases emerge when the temperature is between 800 ℃ and 1 000 ℃. Tensile strengths of specimens at 600 ℃ and 900 ℃ are only 68. 0% and 61.3% of the strength at the room temperature respectively due to the emergence of NiTi2 and Ni3 Ti phases.
出处 《China Welding》 EI CAS 2009年第1期43-46,共4页 中国焊接(英文版)
关键词 NiTi alloy plasma arc heat-affected zone NiTi alloy, plasma arc, heat-affected zone
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