Intermetallics ( IF 4.4 ) Pub Date : 2021-08-17 , DOI: 10.1016/j.intermet.2021.107323 T.M. Butler 1 , O.N. Senkov 1, 2 , M.A. Velez 1, 2 , T.I. Daboiku 1, 2
The microstructures and mechanical properties in compression (25 °C, 1000 °C and 1200 °C) of CrNb, CrNbTi and CrNbTaTi are reported. The CrNb alloy consisted of a Cr2Nb Laves phase matrix and Nb-rich BCC precipitates. After additions of Ti (CrNbTi alloy) the microstructure inverts to a Ti-rich BCC matrix, with Laves phase precipitates inside the matrix phase. Further additions of Ta to CrNbTi refined and decreased the volume fraction of the Laves phase particles in the CrNbTaTi alloy. CrNb exhibited limited ductility at 25 °C and 1000 °C, but became very ductile at 1200 °C and offered the highest compressive strength at all studied temperatures. CrNbTi and CrNbTaTi had better ductility, but suffered from a reduction in compressive strength.
中文翻译:
CrNb、CrNbTi和CrNbTaTi浓缩耐火合金的显微组织和力学性能
报道了 CrNb、CrNbTi 和 CrNbTaTi 在压缩(25°C、1000°C 和 1200°C)下的微观结构和机械性能。CrNb 合金由 Cr 2 Nb Laves 相基体和富含 Nb 的 BCC 析出物组成。添加 Ti(CrNbTi 合金)后,微观结构转变为富含 Ti 的 BCC 基体,Laves 相在基体相内析出。向 CrNbTi 中进一步添加 Ta 可以细化并降低 CrNbTaTi 合金中 Laves 相颗粒的体积分数。CrNb 在 25 °C 和 1000 °C 时表现出有限的延展性,但在 1200 °C 时变得非常具有延展性,并在所有研究温度下提供最高的抗压强度。CrNbTi 和 CrNbTaTi 具有更好的延展性,但抗压强度降低。