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

期刊名字：中國(guó)焊接
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論文作者：XU Yuelan，ZHANG Jun，WANG Fei
作者單位：Department of Material Engineering
更新時(shí)間：2023-02-07
下載次數(shù)：次

論文簡(jiǎn)介

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 roomtemperature respectively due to the emergence of NiTi2 and Ni3Ti phases.

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