Obtenção de rebites com efeito memória de forma a partir de liga Cu-Al-Be-Cr

Abstract

Alloys with shape memory effect are considered as intelligent materials that due to their important characteristics can be applied in the areas: medical, orthodontic and engineering. This work had as main objective the development of rivets shape memory alloy of the Cu-11.8% Al-0.58% Be-0.3% Cr to replace the commercial rivets that are riveted with great difficult access. The alloy was prepared by casting, homogenised, temperate and characterized by optical microscopy, X-ray diffraction and Differential Scanning Calorimetry (DSC). Rivets were made by machining process via turning and cold eletrocut, thus, it was performed its mechanical characterization by hardness testing Rockwell, shearing and tearing, and also the modulus changes elasticity by loads applied through test ultramicrodureza. It was observed the average grain size of 200μm to It provides good mechanical properties confirmed by mechanical characterization of the rivet shape memory. Thus, manufacturing rivets shape memory is an attractive and feasible for employment in unions of difficult access, in fixing parts that need movement about an axis and the replacement commercial rivets.