In this research, the feasibility of making aluminum–copper bimetallic bar by twist extrusion followed by forward extrusion is addressed. In this consecutive process, twist extrusion was used in several passes and its effect was investigated on the bond strength between aluminum and copper as well as the mechanical properties of the produced bimetallic bars. When forward extrusion was the only applied process, the compressive yield and shear bond strength of produced bimetallic bars were 184 MPa and 5.4 MPa, respectively. Applying four twist extrusion passes followed by one forward extrusion pass increased these values such that the compressive yield and shear bond strength were increased by about 64% and 200%, respectively. The hardness was also significantly increased by the utilization of this procedure. Microstructures of copper and aluminum in the produced bars showed that by applying and repetition of the twist extrusion, the grain size was reduced. The Mechanical locking was the main factor in bond formation. Reducing the gap between the metal plates at the interface and increasing the joint fraction improved the shear bond strength.

在这项研究中，解决了通过扭曲挤压然后向前挤压制造铝铜双金属棒的可行性。在此连续过程中，多次使用扭曲挤压，并研究了其对铝和铜之间的结合强度以及所生产的双金属棒的机械性能的影响。当向前挤压是唯一应用的方法时，生产的双金属棒的压缩屈服强度和剪切粘结强度分别为184  MPa和5.4 MPa，分别。施加四次加捻挤压道次，再进行一次正向挤压道次，这些值增加，从而压缩屈服强度和剪切粘结强度分别提高了约64％和200％。通过使用该程序，硬度也显着提高。所生产的棒材中的铜和铝的微观结构表明，通过施加和重复扭曲挤出，晶粒尺寸减小了。机械锁定是形成键的主要因素。减小界面处的金属板之间的间隙并增加接缝率提高了剪切粘结强度。