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利用利用X射线衍射、电子背散射衍射和透射电子显微镜等手段研究了Cu-Ni-Si系合金在不同固溶温度下第二相与织构对其平面各向异性的影响.结果表明:随固溶温度的升高,合金强度和伸长率均出现先升高后降低的趋势,且存在明显的各向异性;800℃固溶时,Cu’和S’为主织构,部分形变晶粒诱发少量Brass、Goss和{011}〈511〉取向的形成,使得合金各向异性减弱;高温固溶时(≥850℃),晶粒发生完全再结晶,Cu’和S’织构强度显著增加,Brass等织构减弱甚至消失,各向异性增强;850℃固溶时效后形成δ-Ni_2Si析出相,并与基体满足[001]_(Cu)//[110]_δ,(010)_(Cu)//(001)_δ位向关系,温度进一步增加,第二相析出体积分数降低,有利于改善材料的各向异性.
The effects of second phase and texture on the plane anisotropy of Cu-Ni-Si alloy at different solution temperatures were studied by X-ray diffraction, electron backscatter diffraction and transmission electron microscopy. The results show that When the solution temperature is 800 ℃, Cu ’and S’ are the main textures, and some of the deformed grains The formation of a small amount of orientation of Brass, Goss and {011} <511 leads to the decrease of the anisotropy of the alloy. At high temperature (≥850 ℃), the grains recrystallize completely and the strength of Cu ’and S’ , Brass et al. The δ-Ni_2Si precipitates formed after solution and aging at 850 ℃, which were consistent with [001] _ (Cu) // [110] _δ, (010) _ Cu) // (001) _δ, the temperature is further increased, and the second phase precipitation volume fraction decreases, which is conducive to improving the material anisotropy.