( 1. 大連海事大學(xué) 材料工藝研究所，大連 116026;
2. 鋼鐵研究總院 結(jié)構(gòu)材料研究所， 北京 100081)
摘 要: 采用有限元法、 Vickers壓痕和滑動磨損實驗研究超彈TiNi合金在法向載荷作用下的機(jī)敏摩擦學(xué)特性。 結(jié)果表明： 超彈TiNi合金的彈性恢復(fù)量大于奧氏體不銹鋼， 在載荷為0.98 N時， 其彈性恢復(fù)量是不銹鋼的1.30倍， 在本實驗條件下， 其滑動磨損量是奧氏體不銹鋼的0.14倍； 綜合有限元計算結(jié)果、 Vickers壓痕以及滑動磨損實驗結(jié)果， 超彈TiNi合金的機(jī)敏摩擦學(xué)特性是其塑性變形臨界載荷和最大彈性應(yīng)變增加、 塑性區(qū)域面積減小以及應(yīng)力增加速度減緩的綜合體現(xiàn)。 這種機(jī)敏摩擦學(xué)特性是TiNi合金具有良好耐磨性的主要原因。
關(guān)鍵字: 有限元法; 超彈TiNi合金; 機(jī)敏摩擦學(xué)特性; 磨損機(jī)理
（1. Institute of Material and Technology, Dalian Marimetime University,
Dalian 116026, China;
2. Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081, China）
Abstract: A finite element method (FEM) and Vickers indentation and sliding wear were used to study the smart tribological properties of pseudo-elastic TiNi alloys. The elastic recovery of TiNi alloys is higher than that of austenitic stainless steel, under the normal load of 0.98 N, the elastic recovery of the former is 1.30 times of that of the latter. The volume loss of the TiNi alloy is only 0.14 times of that of the austenitic steel under the sliding wear. Considering the results of FEM and Vickers indentation and sliding wear, the smart tribological properties of pesudo-elastic TiNi alloys are integrative embodiments as follows: increasing plastic deformation critical load and maximum elastic strain, decreasing the plastic deformation region and slowing the stress increasing trend. This smart tribological property is the main reason of high wear resistance of TiNi alloys.
Key words: finite element method; pseudo-elastic TiNi alloys; smart tribological properties; wear mechanism
