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Title: The effect of directional solidification parameter on the structure and property of Ni{sub 50}Al{sub 20}Fe{sub 30}

Abstract

The authors have found that the directional solidification parameters affect the structure and properties of Ni{sub 50}Al{sub 20}Fe{sub 30} markedly. When the pulling rates are >0.19mm/min, coarse dendritic pro-eutectic {beta} phase with interdendritic {gamma} phase surrounded by eutectic area structure is formed. When the pulling rates are {le}0.19mm/min, completely eutectic lamellae structure is formed. Primary dendrite arm spacing, thickness of {beta} lamellae and thickness of the {gamma} lamellae increase with decreasing pulling rate. The yield stress and fracture stress decrease slightly with decreasing pulling rate. An anomalous decrease of the {gamma} lamellae thickness nd increase of the yield stress with decreasing pulling rate occur, which are caused by the chance from dendritic solidification to the planar solidification process. Fracture mode changes with different microstructure. The directionally solidified samples with dendritic structure exhibit the high ductility. The easy load transfer from the pro-eutectic area to the eutectic area and plastic deformation of the interdendritic {gamma} phase together with the appearance of thick interdendritic {gamma} phase and a relatively thicker lamellae {gamma} phase induces the higher ductility.

Authors:
; ; ; ; ;  [1]
  1. Academia Sinica, Shenyang (China). Institute of Metal Research
Publication Date:
OSTI Identifier:
103583
Resource Type:
Journal Article
Journal Name:
Scripta Metallurgica et Materialia
Additional Journal Information:
Journal Volume: 33; Journal Issue: 4; Other Information: PBD: 15 Aug 1995
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; NICKEL ALLOYS; TENSILE PROPERTIES; MICROSTRUCTURE; ALUMINIUM ALLOYS; IRON ALLOYS; INTERMETALLIC COMPOUNDS; SCANNING ELECTRON MICROSCOPY; DENDRITES; LAMELLAE; YIELD STRENGTH; FRACTURES; EUTECTICS; DUCTILITY

Citation Formats

Chen, J., Zheng, Q., Li, Y.A., Yu, Y., Tang, Y.J., and Hu, Z.Q. The effect of directional solidification parameter on the structure and property of Ni{sub 50}Al{sub 20}Fe{sub 30}. United States: N. p., 1995. Web. doi:10.1016/0956-716X(95)00286-5.
Chen, J., Zheng, Q., Li, Y.A., Yu, Y., Tang, Y.J., & Hu, Z.Q. The effect of directional solidification parameter on the structure and property of Ni{sub 50}Al{sub 20}Fe{sub 30}. United States. doi:10.1016/0956-716X(95)00286-5.
Chen, J., Zheng, Q., Li, Y.A., Yu, Y., Tang, Y.J., and Hu, Z.Q. Tue . "The effect of directional solidification parameter on the structure and property of Ni{sub 50}Al{sub 20}Fe{sub 30}". United States. doi:10.1016/0956-716X(95)00286-5.
@article{osti_103583,
title = {The effect of directional solidification parameter on the structure and property of Ni{sub 50}Al{sub 20}Fe{sub 30}},
author = {Chen, J. and Zheng, Q. and Li, Y.A. and Yu, Y. and Tang, Y.J. and Hu, Z.Q.},
abstractNote = {The authors have found that the directional solidification parameters affect the structure and properties of Ni{sub 50}Al{sub 20}Fe{sub 30} markedly. When the pulling rates are >0.19mm/min, coarse dendritic pro-eutectic {beta} phase with interdendritic {gamma} phase surrounded by eutectic area structure is formed. When the pulling rates are {le}0.19mm/min, completely eutectic lamellae structure is formed. Primary dendrite arm spacing, thickness of {beta} lamellae and thickness of the {gamma} lamellae increase with decreasing pulling rate. The yield stress and fracture stress decrease slightly with decreasing pulling rate. An anomalous decrease of the {gamma} lamellae thickness nd increase of the yield stress with decreasing pulling rate occur, which are caused by the chance from dendritic solidification to the planar solidification process. Fracture mode changes with different microstructure. The directionally solidified samples with dendritic structure exhibit the high ductility. The easy load transfer from the pro-eutectic area to the eutectic area and plastic deformation of the interdendritic {gamma} phase together with the appearance of thick interdendritic {gamma} phase and a relatively thicker lamellae {gamma} phase induces the higher ductility.},
doi = {10.1016/0956-716X(95)00286-5},
journal = {Scripta Metallurgica et Materialia},
number = 4,
volume = 33,
place = {United States},
year = {1995},
month = {8}
}