波-平轧制钛/铝复合板界面组织特性及性能研究

Study on Interfacial Microstructure and Properties of Ti/Al Composite Plate by Wave-flat Rolling

摘要:

建立Ti/Al复合板波-平轧与平轧有限元模拟并进行实验,分析不同轧制方式对复合板微观组织及力学性能的影响。结果表明,复合板压下率为40%时翘曲程度较35%更低,波-平轧复合板的等效应力及应变均大于平轧复合板,其结合界面未发现孔洞与裂缝,波峰处界面扩散层厚度为1.8μm,波谷处为2.4μm,而平轧复合板的界面扩散层厚度为1.6μm,并且波-平轧复合板Al板的再结晶程度高于平轧,其抗拉强度,抗弯性能,硬度也高于平轧复合板,但由于加工硬化作用延伸率较低。

Abstract:

The finite element simulation of wave-flat rolling and flat rolling of Ti/Al composite plate was established and experiments were carried out to analyze the effects of different rolling modes on the microstructure and mechanical properties of the composite plate.The results show that the warpage degree of the clad plate is lower than that of 35% when the reduction rate of the clad plate is 40%, the equivalent stress and strain of the wave-flat-rolled clad plate are larger than those of the flat-rolled clad plate, and no holes and cracks are found in the bonding interface.The thickness of the interfacial diffusion layer at the crest of the wave is 1.8μm, and that at the trough is 2.4μm, while the thickness of the interfacial diffusion layer of the flat-rolled clad plate is 1.6μm.The degree of recrystallization of the wave-flat-rolled clad plate Al plate is higher than that of flat-rolling, and its tensile strength, bending resistance, and hardness are also higher than those of the flat-rolled clad plate, but the elongation is lower due to work hardening.