摘要
本文研究了静电场处理对GH4169合金的组织及拉伸变形行为的影响。结果表明,经静电场处理后合金基体中空位数量大幅增加,缺陷能升高。在10~(-4)s~(-1)和10~(-2)s~(-1)应变速率下进行室温拉伸,由静电场处理诱发的晶格畸变和间隙原子对运动位错产生明显的阻碍作用。使合金屈服强度和抗拉强度提高。在室温低应变速率拉伸时,在试样颈缩区域,累积的应变能和初始较高的缺陷能使该区域内能大幅提升,为局部原子的重新排列提供了能量,合金晶粒发生碎化。
This paper studies the influence of electric field treatment on microstructure and tensile deformation behaviour of GH4169 superalloy.Results show that,an electric field applied on the standard heating treated GH4169 alloy,the quantity of vacancies and defect energy of the alloy increase.Tensile test was operated at room temperature in the strain rates of10~(-4) s~(-1) and 10~(-2) s~(-1),the alloy strength increase obviously because the dislocation motion is hindered by the interstitial atoms induced by EFT.In necking region,grain refinement takes place in the EFTed alloy,and the energy for the atomic arrangement is provided by the increased strain energy and initial defect energy.
引文
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