columnar crystal meaning in English

柱状结晶
柱状晶体

Abstract : the crystal structures obtained by static solidification and vibration solidification were compared . it was showed that , in the case of vibration solidification , the orientation growth of the columnar crystal was not obvious , the equiaxial crystal appeared more early . the grains of both types of crystals were quite fine , hardness in the full section was relatively high , and the hardness distribution was uniform . in the former case , the solute segregation in dendritical austenite more severe , and there were lumps of distortion inclusion
文摘:对球铁金属型静凝固与振动凝固的结晶组织对比表明：后者柱状晶方向性生长较弱，等轴晶出现较早，且两者的晶粒均较细，全断面硬度较高且分布均匀；前者枝晶奥氏体内溶质偏析大，有畸变夹杂团块。