摘要
通过EBSD和OM等对Cu-Sn-P合金200～500℃的热变形组织进行分析。研究表明:经热变形后晶粒组织垂直于受力方向被拉长,大部分为变形晶粒,应变硬化效果明显,基体内部存在较大的形变储能。再结晶主要在位错密度较大区域形核,软化作用比较微弱,因此未出现真应力的稳定区域。随着温度升高,织构极密度逐渐增大,主要为沿(111)面分布的丝织构,变形初期存在板织构。
The hot deformation microstructure of Cu-Sn-P alloy at 200-500 ℃ was analyzed by EBSD and OM.The results show that after hot deformation,the grains are elongated perpendicular to the direction of the force,most of which are deformed grains,and the strain hardening effect is obvious,and there is a large deformation energy storage inside the matrix.Recrystallization mainly nucleates in a region with a large dislocation density,and the softening effect is relatively weak,so that a stable region of true stress does not appear.As the temperature increases,the density of the texture increases gradually,mainly due to the fiber texture distributed along the(111) plane.
引文
[1]孙爱俊,谢春生.槽楔用CuNiCrBeTi铜合金的热处理工艺及其组织与性能[J].金属热处理,2018,43(11):73-76.Sun Aaijun,Xie Chunsheng.Heat treatment process of slot wedge CuNiCrBeTi alloy and its microstructure and mechanical properties[J].Heat Treatment of Metals,2018,43(11):73-76.
[2]金磊磊,陈爱华.深冷处理对铜合金组织与性能影响[J].金属热处理,2018,43(9):199-202.Jin Leilei,Chen Aihua.Effect of cryogenic treatment on microstructure and properties of copper alloy[J].Heat Treatment of Metals,2018,43(9):199-202.
[3]李明茂,张乐清.微量铪对铜及铜铬合金组织及性能的影响[J].金属热处理,2018,43(8):23-30.Li Mingmao,Zhang Leqing.Effect of trace hafnium on microstructure and properties of Cu and Cu-Cr alloys[J].Heat Treatment of Metals,2018,43(8):23-30.
[4]Dash S,Brown N.An investigation of the origin and growth of annealing twins[J].Acta Metallurgica,1963,11(9):1067-1075.
[5]Shakiba M,Parson N,Chen X G.Effect of iron and silicon content on the hot compressive deformation behavior of dilute Al-Fe-Si alloys[J].Journal of Materials Engineering and Performance,2015,24(1):404-415.
[6]Robert E V C,Gunder R.Synthesis,theoretical and experimental characterisation of thin film Cu2Sn1-xGexS3,ternary alloys(x=0 to1):Homogeneous intermixing of Sn and Ge[J].Acta Materialia,2018(151):125-136.
[7]Gan W M,Huang Y D,Wang R,et al.Microstructures and mechanical properties of pure Mg processed by rotary swaging[J].Materials and Design,2014,63(21):83-88.
[8]Darling K A,Rajagopalan M.Extreme creep resistance in a microstructurally stable nanocrystalline alloy[J].Nature,2016,537(7620):378-381.
[9]Righter K,Danielson L R,Pando K M,et al.Valence and metal/silicate partitioning of Mo:Implications for conditions of earth accretion and core formation[J].Earth and Planetary Science Letters,2016,437:89-100.
[10]Somidin F,Maeno H.Characterising the polymorphic phase transformation at a localised point on a Cu6Sn5 grain[J].Materials Characterization,2018,138:113-119.
[11]Nayyeri G,Mahmudi R,Salehi F.The microstructure,creep resistance,and high-temperature mechanical properties of Mg-5Sn alloy with Ca and Sb additions,and aging treatment[J].Materials Science and Engineering A,2010,527(21):5353-5359.
[12]Sakai T,Belyakov A,Kaibyshev R,et al.Dynamic and post-dynamic recrystallization under hot,cold and severe plastic deformation conditions[J].Progress in Materials Science,2014,60(1):130-207.
