T5态7N01铝合金挤压型材的组织及拉伸性能各向异性

对T5热处理状态下的7N01铝合金挤压型材进行微观组织观察和拉伸强度测试。试验结果表明,7N01型材显微组织存在一定程度上的不均匀以及各向异性,沿挤压方向上的晶粒被拉长形成形变织构。这种形变织构能够更有效地抵抗挤压方向上的塑性变形,因此沿挤压方向的强度比垂直于挤压方向高,伸长率下降约2%。7N01铝合金挤压型材在室温抗拉强度约为368 MPa,屈服强度约为318 MPa,综合性能表现良好。

Microstructure and anisotropy tensile properties of T5 state 7N01 aluminum alloy extruded profile

The microstructure and tensile strength of 7 N01 aluminum alloy extruded profiles under T5 heat treatment were studied.The results show that the microstructure of the 7 N01 profile has a certain degree of non-uniformity and anisotropy,and the grains in the extrusion direction are elongated to form a deformation texture.Such deformation texture can more effectively resist plastic deformation in the extrusion direction,so the strength in the extrusion direction is higher than that perpendicular to the extrusion direction,and the elongation is reduced by about 2%.The tensile strength and yield strength of the 7 N01 aluminum alloy extruded profiles at room temperature is about 368 MPa and about 318 MPa respectively,and the comprehensive properties is good.