纯铝搅拌摩擦加工后微观组织及硬度的演化规律(英文)

研究轧制态纯铝经搅拌摩擦加工后的微观组织、织构及硬度。采用EBSD技术表征横截面的微观组织及织构。结果表明:焊合区晶粒呈等轴的完全再结晶状。基材主要包含的织构组分有R、S及黄铜R,同时含有少量的铜型织构。在焊合区中心,主要的织构组分是平行于ND指向RD 70°方向的(111),这一区域的织构绕着ND顺时针旋转30°和逆时针旋转60°分别得到回退侧和前进侧距离此区域3 mm的织构。

Evolution of microstructure and hardness of aluminum after friction stir processing

The effects of friction stir processing （FSP） on the microstructure, microtexture and hardness of rolled pure aluminum were investigated. The microstructure and microtexture were characterized using electron backscattered diffraction （EBSD） technique on the transversal section. The stir zone （SZ） contains fine, equiaxed and fully recrystallized grains. The texture component of the base material mainly consists of R, S and brass R textures. Miner copper texture component is also determined. In the center of the stir zone, the dominant texture is （111） parallel to about 70° from ND pointing toward RD. The textures of this location rotating clockwise about 30° and anticlockwise about 60° around the ND result in the textures of the areas, which are 3 mm apart from this location on the retreating side and advancing side, respectively.