论文部分内容阅读
采用铜模吸铸法成功制备Cu含量不同但直径相同的TiN i基非晶复合材料试样 (Ti_(0.5)Ni_(0.5))_(100-x)Cu_x,研究Cu含量(x=0,10,15,20,25,30,35,40)对TiN i基非晶复合材料组织和力学性能的影响。试验结果表明,在铜的含量x=20时,合金断裂强度和塑性应变都很高,此时合金具有最优良的综合性能。随着x值的增大, (Ti_(0.5)Ni_(0.5))_(100-x)Cu_x合金的非晶形成能力呈现一个从上升、降低再到上升的波形变化,但总体呈现降低趋势。Cu元素在TiN i基复合材料中的适量添加(x≈25)可以提高TiN i基非晶材料的塑性,但添加量较多(x>30)时,既不能提高合金的非晶形成能力又不能提高合金的强度。在x=15时,合金有最高的断裂强度2440 MPa,达到了较高的屈服强度1471MPa,且其产生了17.15%的塑性应变,在x=25时,合金塑性应变有所提高,塑性变形达到了21.35%。
(Ti 0.5 Ni 0.5) _ (100-x) Cu_x with different Cu content and same diameter was successfully prepared by copper mold suction casting. The effects of Cu content (x = 0, 10,15,20,25,30,35,40) on the microstructure and mechanical properties of TiNi-based amorphous composites. The experimental results show that the fracture toughness and plastic strain of the alloy are high when the content of Cu is x = 20, and the alloy has the most excellent comprehensive properties. With the increase of x value, the amorphous formation ability of (Ti_ (0.5) Ni_ (0.5)) _ (100-x) Cu_x alloy presents a waveform change from rising to decreasing to rising, The proper addition of Cu to TiNi matrix composites (x ≈ 25) can improve the plasticity of TiN i -based amorphous materials. However, the addition of Cu (x> 30) can not improve the amorphous formability Can not improve the strength of the alloy. At x = 15, the alloy has the highest breaking strength of 2440 MPa, reaching a high yield strength of 1471 MPa and producing a plastic strain of 17.15%. At x = 25, the plastic deformation of the alloy is increased and the plastic deformation reaches 21.35%.