中文摘要：

nanostructured 表面层被使用高精力的射击 peening (HESP ) 在 AZ91D 镁合金上制作。HESP 沿着对待的样品表面层的深度导致了结构借助于 X 光检查衍射计(XRD ) 被描绘，传播电子显微镜(TEM ) 和高分辨率传播电子显微镜(HRTEM ) 。大约 50 m 的使变形的层在 HESP 处理和平均谷物尺寸以后形成了的试验性的结果表演在 40 m 的深度在表面层从大约 40 nm 增加到大约 200 nm。表面 nanocrystallization 能认识到滑倒的脱臼和动态再结晶的 intercoordination。nanocrystalline 谷物让在他们的内部叠差错和脱臼。最高的表面的 microhardness 在附近三倍纹理粗糙的矩阵的。

英文摘要：

A nanostructured surface layer was fabricated on a AZ91D magnesium alloy by using a high-energy shot peening（HESP）. HESP induced structure along the depth of the treated sample surface layer was characterized by means of X-ray diffractometer （XRD）, transmission electron microscope（TEM） and high resolution transmission electron microscopc（HRTEM）. The experimental results show that a deformed layer of about 50 μm has formed after HESP treatment and the average grain size increases from about 40 nm in the surface layer to about 200 nm at the depth of 40 μm. The surface nanocrystallization can realize intercoordination of the dislocations slipping and dynamic recrystallization. The nanocrystalline grains have stacking faults and dislocation in their interiors. The microhardness of the top surface is about triplicate that of the coarse-grained matrix.