欢迎登录材料期刊网
ZHANG Zhonghua , SUN Yangshan , GUO Jun(Department of Materials Science and Engineering , Southeast University , Nanjing 210096 , China)
金属学报(英文版)
Small amount(0.5-0.8at.%) of niobium addition to the multicomponent alloys based on Fe3Al(Fe-28Al-5Cr-0.5Mo-0.05Zr-0.05B-0.1Ce) results in the microstructural refinement and the increase in the yield strength at temperatures up to 600℃,but is not beneficial to room temperature ductility.Results of microanalysis indicate that the addition of niobium causes the formation of precipitates with complex compositions which strengthen both matrix and grain boundaries and enhance the creep resistance of the alloys.
关键词: :Fe_3Al , null , null , null
林均品 , 王晶云 , 褚武扬 , 肖纪美
金属学报
研究了Ｆｅ_３Ａｌ在９００－１３００℃、形变速率为１－１０~（－３）ｓ~（－１）的热压缩过程中的动态复原机制．结果表明，当Ｚ参数大于临界值时，该合金发生动态再结晶，反之则仅发生动态回复．动态再结晶是通过亚晶形核方式进行的．热压缩时真应力随真应变的增大而不断增加．所有的真应力—真应变曲线呈锯齿形（ｊｅｒｋｙｆｌｏｗ），且随形变速率下降锯齿形更明显．
关键词: Ｆｅ_３Ａｌ , dynamic restoraftion mechanism , hot compression , dynamic reerystallization
