(1. 太原理工大學(xué) 材料科學(xué)與工程學(xué)院，太原 030034；
2. 山西工程技術(shù)學(xué)院，陽泉 045000)
摘 要: 層錯能是金屬材料重要的本征參數(shù)，對金屬材料變形機(jī)制和力學(xué)性能有著重要的影響。特別是在強(qiáng)烈塑性變形過程中，層錯能的變化對金屬變形機(jī)制和晶粒細(xì)化機(jī)制有著決定性作用。層錯能的測定或計(jì)算方法有很多種，熱力學(xué)法能夠方便快捷地計(jì)算出層錯能的值，可以直觀地判斷溫度、成分等對合金層錯能的影響。采用熱力學(xué)方法計(jì)算純Cu及Cu-Ti、Cu-Zn合金的層錯能，計(jì)算結(jié)果表明：在室溫條件下，Cu-Ti和Cu-Zn合金的層錯能都隨溶質(zhì)元素含量的增加而降低，兩種合金中添加相同含量的溶質(zhì)元素，溶質(zhì)元素Ti對合金層錯能的影響更大；兩種合金偏聚自由能隨溶質(zhì)元素含量的增加而升高。
關(guān)鍵字: 銅合金；層錯能；熱力學(xué)
（1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2. Shanxi Institute of Technology, Yangquan 045000, China）
Abstract:Stacking fault energy (SFE) is an intrinsic parameter of metallic material, which has a significant impact on the plastic deformation mechanism and mechanical property. Especially for severe plastic deformation, the SFE can change the deformation and grain refinement mechanism of metal. There are many measurements or methods for calculating the value of SFE. Thermodynamic method, as one of the widely adopted way, can visually detect the effect of the temperature and alloying elements on the SFE. The thermodynamic method was used to estimate the SFE value of Cu, Cu-Ti and Cu-Zn alloys. The results show that at room temperature, the SFE values of Cu-Ti and Cu-Zn alloys decrease with the concentration of alloying elements increasing. When the same solute element content of two kinds of alloys is added, the solute Ti has more influence on the stacking fault energy of alloy. The segregation free energy for Cu-Zn and Cu-Ti alloy would be raised with the increasing of solute elements.
Key words: Cu alloy; stacking fault energy; thermodynamic
