Fe_3Al轧板中的晶粒尺寸对拉伸和蠕变性能的影响

Mechanical Properties of Fe 3Al Plates with Different Grain Sizes

研究了成分相同而晶粒大小不同的 Fe3Al轧制板材的拉伸和蠕变性能 ,表明了晶粒尺寸对不同 Fe3Al基板材拉伸和蠕变性能的复杂影响。室温下随晶粒的减小强度和延性均增加。经过再结晶处理的试样 ,油淬后显微组织的改善导致室温拉伸性能的提高。然而未经过再结晶处理试样的延展性提高则是由于横截面上晶界数目减少的结果。较厚的试样 ,由于晶粒较粗大 ,所以在 6 0

The effects of microstructure on tensile and creep properties of Fe 3Al rolling sheets have been investigated.The results show that both strength and ductility in crease with the decrease of grain size of the Fe 3Al matrix.For the recrystallized specimen,the improvement of the RT tensile properties is caused by microstructual refinement if the specimen tested is oil quenched.However,the ductility enhancement for the unrecrystallized speciment is a result of minimizing the transverse grain boundaries.At 600℃ for the thicker sheets,both the tensile strength and creep resistance of the specimens corresponding to larger grain size are higher than those with fine microstructure.