当前位置: X-MOL 学术J. Alloys Compd. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Phase stability of the AlxCrFeCoNi alloy system
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2022-08-10 , DOI: 10.1016/j.jallcom.2022.166734
M.E. Bloomfield , K.A. Christofidou , P.M. Mignanelli , A-P.M. Reponen , H.J. Stone , N.G. Jones

The addition of Al to the A1 CrFeCoNi alloy has been shown to promote the formation of intermetallic phases, offering possibilities for the development of alloys with advantageous mechanical properties. However, despite numerous experimental investigations, there remain significant uncertainties as to the phase equilibria in this system particularly at temperatures below 1000°C. The present study makes a systematic assessment of the literature data pertaining to the equilibrium phases in alloys of the AlxCrFeCoNi system. Two alloys, with atomic ratios, x = 0.5 and 1.0, are then selected for further experimental investigation, following homogenisation (1200°C/72 h) and subsequent long-duration (1000 h) heat-treatments at 1000, 850 and 700°C. The Al0.5 alloy was found to be dual-phase A1 + B2 in the homogenised condition and following exposure at 1000°C but D8b phase precipitates developed following heat-treatment at the lower temperatures. In the Al1.0 alloy, B2, A2 and A1 phases were identified in the homogenised condition and at 1000°C. At 850 and 750°C, the A2 phase was replaced by the D8b phase. These experimental observations were used alongside literature data to assess the veracity of CALPHAD predictions made using the TCHEA4 thermodynamic database.



中文翻译:

AlxCrFeCoNi合金体系的相稳定性

已显示向 A1 CrFeCoNi 合金中添加 Al 可促进金属间相的形成,为开发具有有利机械性能的合金提供了可能性。然而,尽管进行了大量的实验研究,但该系统中的相平衡仍然存在很大的不确定性,特别是在低于 1000°C 的温度下。本研究对有关 Al x CrFeCoNi 系统合金中平衡相的文献数据进行了系统评估。然后选择原子比x  = 0.5 和 1.0 的两种合金进行进一步的实验研究,经过均匀化(1200°C/72 小时)和随后在 1000、850 和 700° 的长时间(1000 小时)热处理C。铝0.5合金在均质条件下和暴露于 1000°C 后被发现是双相 A1 + B2,但在较低温度下热处理后会形成D8 b相沉淀物。在 Al 1.0合金中,B2、A2 和 A1 相在均质条件下和 1000°C 下被识别。在 850 和 750°C 时,A2 相被 D8 b相取代。这些实验观察结果与文献数据一起使用,以评估使用 TCHEA4 热力学数据库做出的 CALPHAD 预测的准确性。

更新日期:2022-08-10
down
wechat
bug