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首页> 外文期刊>Journal of Materials Engineering and Performance >Dynamic Embrittlement in Cu-Cr-Zr-Ti Alloy: Evidence of Intergranular Segregation of Sulphur
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Dynamic Embrittlement in Cu-Cr-Zr-Ti Alloy: Evidence of Intergranular Segregation of Sulphur

机译：Cu-Cr-Zr-Ti合金中的动态脆化：硫沿晶偏析的证据

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摘要

In the present investigation, Cu-0.6Cr-0.005Zr-0.0045Ti alloy was subjected to different heat treatment and thermomechanical treatment (TMT) to simulate the conditions experienced during brazing and forming, respectively. Grain coarsening was observed in the samples subjected to heat treatment, and grain refinement was observed in the samples subjected to TMT. Tensile tests conducted with these samples at room temperature and 600℃ have shown that Cu-Cr-Zr-Ti alloy was susceptible to dynamic embrittlement (DE). However, the observation was limited to coarse-grained samples (280-350 μm) at 600℃. On the other hand, the fine-grained samples (20-40 μm) showed good ductility. Electron microscopy studies conducted on the tensile-tested specimens prone to DE indicated the presence of sulfur on the fractured surface and intergranular segregation of sulfur. Therefore, it can be inferred from the results that DE due to sulfur can occur in Cu-Cr-Zr-Ti alloy at elevated temperature for coarse-grained samples.
机译：在本研究中，对Cu-0.6Cr-0.005Zr-0.0045Ti合金进行了不同的热处理和热机械处理（TMT），以分别模拟钎焊和成形过程中遇到的条件。在经过热处理的样品中观察到晶粒粗化，并且在经过TMT的样品中观察到晶粒细化。在室温和600℃下对这些样品进行的拉伸试验表明，Cu-Cr-Zr-Ti合金易受动态脆化（DE）的影响。然而，该观察仅限于600℃下的粗颗粒样品（280-350μm）。另一方面，细颗粒样品（20-40μm）显示出良好的延展性。对易于产生DE的拉伸测试样品进行的电子显微镜研究表明，断裂表面上存在硫，并且硫在晶界偏析。因此，可以从结果推断出，在高温下，粗颗粒样品在Cu-Cr-Zr-Ti合金中会发生因硫引起的DE。

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