【摘要】 研究了变形温度和应变速率对半固态LY11合金变形行为和微观组织的影响。研究结果表明 :在液固温度区间变形时 ,变形温度、应变速率对半固态LY11合金的流变应力峰值影响显著 ,对稳态流变应力影响较小。对微观组织的影响是 :随着变形温度的升高和应变速率的降低 ,固相晶粒尺寸增大 ,但仍保持初始的近球状。在半固态合金的压缩过程中 ,随着工艺参数的变化 ,占主导地位的变形机制也随之变化。更多还原

【Abstract】 The effects of deformation temperature and the strain rates on deformation behavior and microstructure of the semi-solid LY11 alloy were investigated in the condition of isothermal compression.The results indicated that deformation temperature and strain rate have significant effects on peak value of stress of the alloy while slightly affect steady stress with deformation in liquid-solid temperature zone.The solid grain size keeping initial near-spheroid increases with the increase of deformation temperature and the decrease of strain rate.The dominant deformation mechanism varies with varying the processing parameters during compression.更多还原