Tamayo-Meza Pedro Alejandro, Cerro-Ramírez Miguel Ángel, Merchán-Cruz Emmanuel Alejandro, Silva-Rivera Usiel Sandino, Rivera-Blas Raúl, Flores-Herrera Luis Armando
Postgraduate Studies and Research Section, Instituto Politecnico Nacional, Higher School of Mechanical and Electrical Engineering, U. Azcapotzalco, Av. Granjas 682, Mexico City 02250, Mexico.
Mechatronics Engineering Department, Tecnológico de Estudios Superiores de Coacalco, Av. 16 de Septiembre 54, Coacalco de Berriozábal 55700, Edo. de Mex., Mexico.
Materials (Basel). 2020 Dec 30;14(1):134. doi: 10.3390/ma14010134.
One important challenge that faces the metallurgic industry turns around the constant increment in the mechanical resistance of certain finished products. Metallurgic advantages can be obtained from the inclusion of microparticles in metallic materials, but this inclusion involves complex challenges as the internal stress distribution can be modified. In this work, the simulation of a cooling sequence in 7075 aluminum with a SiO microparticle is presented. Two models of two-dimensional (2D) type were constructed in ANSYS2019 with circular and oval shape microparticles located inside the aluminum. Both models were subjected to the same thermomechanical transient analysis to compare the remaining stress distributions around the microparticles after the thermal load and to observe the effect of the geometrical shape. The results show remaining stresses increased in the oval model as a consequence of the geometrical shape modification. After applying a tension load in the analyzed specimens, shear stress concentrations were observed with a higher magnitude around the covertex of the oval shape. The results can be very useful for the creation of materials with controlled remnant stress located in specific or desired locations in the matrix.
冶金行业面临的一个重要挑战围绕着某些成品机械强度的持续提高。在金属材料中加入微粒可获得冶金优势，但这种加入涉及复杂挑战，因为内部应力分布可能会改变。在这项工作中，展示了对含有SiO微粒的7075铝冷却过程的模拟。在ANSYS2019中构建了两种二维（2D）模型，铝内部有圆形和椭圆形微粒。两个模型都进行了相同的热机械瞬态分析，以比较热载荷后微粒周围的残余应力分布，并观察几何形状的影响。结果表明，由于几何形状的改变，椭圆形模型中的残余应力增加。在对分析的试样施加拉伸载荷后，在椭圆形顶点周围观察到更高强度的剪应力集中。这些结果对于在基体中特定或期望位置创建具有可控残余应力的材料非常有用。
