Hot ductility of Fe- 36Ni invar alloy

被引：0
|
作者：
He Y.-T. [1 ,2 ]
Wang F.-M. [1 ,2 ]
Li C.-R. [3 ]
Yang Z.-B. [1 ,2 ]
Zhang J. [1 ,2 ]
Li Y.-L. [1 ,2 ]
机构：
[1] School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing
[2] State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing
[3] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing
来源：
Wang, Fu-Ming (wangfuming@metall.ustb.edu.cn) | 1600年 / Science Press卷 / 38期
关键词：
Dynamic recrystallization; Grain boundary sliding; Hot ductility; Inclusions; Iron nickel alloys;
D O I：
10.13374/j.issn2095-9389.2016.11.010
中图分类号：
学科分类号：
摘要：
The hot ductility behaviors of Fe- 36Ni alloy in the temperature range of 900-1200℃ were investigated by using a Gleeble-3800 thermal simulator. The influence factors and mechanism of action on the hot ductility were systematically analyzed by FactSage software, scanning electron microscopy and transmission electron microscopy. The results show that inclusions in the investigated alloy are mainly Al2O3+Ti3O5+MnS, and most inclusion sizes are below 0.5 μm. The hot ductility of the alloy in the temperature range of 900-1050℃ is influenced by grain boundary sliding and dynamic recrystallization. Nano-scale size (<200 nm) inclusions at grain boundaries effectively inhibit the occurrence of dynamic recrystallization as a result of the pinning effect and decrease the grain boundary cohesion. Moreover, micro-scale size (>200 nm) inclusions at grain boundaries promote the nucleation and propagation of cracks during grain boundary sliding and decrease the hot ductility of the alloy. Increasing the temperature makes the driving force for dynamic recrystallization larger than the pinning effect, and thus increases the hot ductility significantly by the occurrence of dynamic recrystallization when the temperature exceeds 1050℃. In the temperature range of 1100-1200℃, the formation of interdendritic cracks, the coarsening of recrystallized grains and the enhanced grain boundary sliding deteriorate the hot ductility of the alloy. © All right reserved.
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页码：1576 / 1583
页数：7
相关论文
共 17 条
  • [1] Zhao Y., Sato Y.S., Kokawa H., Et al., Microstructure and properties of friction stir welded high strength Fe-36wt% Ni alloy, Mater Sci Eng A, 528, 25-26, (2011)
  • [2] Liu H.W., Sun Z.H., Wang G.K., Et al., Effect of aging on microstructures and properties of Mo-alloyed Fe-36Ni invar alloy, Mater Sci Eng A, 654, (2016)
  • [3] Ramirez A.J., Lippold J.C., High temperature behavior of Ni-base weld metal: Part I. Ductility and microstructural characterization, Mater Sci Eng A, 380, 1-2, (2004)
  • [4] Mintz B., The influence of composition on the hot ductility of steels and to the problem of transverse cracking, ISIJ Int, 39, 9, (1999)
  • [5] Chen X.M., Song S.H., Sun Z.C., Et al., Effect of microstructural features on the hot ductility of 2.25 Cr-1Mo steel, Mater Sci Eng A, 527, 10-11, (2010)
  • [6] Lu B., Zhang F.C., Li M., Et al., Effects of phosphorus and sulfur on the thermoplasticity of high manganese austenitic steel, Mater Sci Eng A, 527, 21-22, (2010)
  • [7] Zheng H.G., Li Y., Liu X.F., Effects of Zr on the solidification structure and hot ductility of Fe-36Ni invar alloy, J Univ Sci Technol Beijing, 36, (2014)
  • [8] Abbasi S.M., Morakabati M., Mahdavi R., Et al., Effect of microalloying additions on the hot ductility of cast FeNi36, J Alloys Compd, 639, (2015)
  • [9] Mohamed Z., Hot ductility behavior of vanadium containing steels, Mater Sci Eng A, 326, 2, (2002)
  • [10] Doherty R.D., Hughes D.A., Humphreys F.J., Et al., Current issues in recrystallization: a review, Materi Sci Eng A, 238, 2, (1997)
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