大多数拉伸时形成缩颈的韧性金属材料，其均匀塑性变形量比集中塑性变形量要

大多数拉伸时形成缩颈的韧性金属材料，其均匀塑性变形量比集中塑性变形量要小得多，一般不超过集中变形量的50%。

結果 (英文) 1:

Most tensile necking form when Ductile metals, focus its uniform plastic deformation than much smaller deformation, generally no more than concentrate deformation of 50%.

結果 (英文) 3:

Most ductile metal materials formed in the tension, the uniform plastic deformation is much smaller than the concentrated plastic deformation, generally not more than 50% of the concentration of deformation.