Texture (preferred orientation) has a significant influence on the formability of metals. This was shown experimentally for rolled steel sheet by Stickels and Mould [1]. They found a correlation between the in-plane angular variation of r-value and the anisotropy of Young’s modulus, E, as measured by ultrasonics. The r-value is a measure of plastic strain on deep drawing, defined as ϵyy/(∈yy + ∈zz), with ∈yy the in-plane strain and ∈zz the strain in the thickness direction.
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机译：织构（首选取向）对金属的可成型性有重要影响。 Stickels and Mold [1]在轧制钢板的实验中证明了这一点。他们发现，通过超声波测量，r值的面内角度变化与杨氏模量E的各向异性之间存在相关性。 r值是深拉塑性变形的量度，定义为ϵyy /（∈yy+∈zz），其中∈yy是平面应变，而∈zz是厚度方向的应变。
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