Effect of solution heat treatment on the microstructure and mechanical properties of Inconel 625 superalloy fabricated by laser solid forming

被引：136
作者：
Hu, Y. L. [1 ,2 ]
Lin, X. [1 ,2 ]
Zhang, S. Y. [1 ,2 ]
Jiang, Y. M. [1 ,2 ]
Lu, X. F. [1 ,2 ]
Yang, H. O. [1 ,2 ]
Huang, W. D. [1 ,2 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, 127 Youyixilu, Xian 710072, Shaanxi, Peoples R China
[2] Northwestern Polytech Univ, MIIT China, Key Lab Met High Performance Addit Mfg & Innovat, 127 Youyixilu, Xian 710072, Shaanxi, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 767卷
基金：
中国国家自然科学基金;
关键词：
Laser solid forming; Solution heat treatment; Microstructure; Laves phase; Mechanical properties; NB-BEARING SUPERALLOYS; LAVES PHASE; STAINLESS-STEEL; ALLOY; DEPOSITION; EVOLUTION; BEHAVIOR; SOLIDIFICATION; DISSOLUTION; RECRYSTALLIZATION;
D O I：
10.1016/j.jallcom.2018.07.087
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this study, the effect of solution heat treatments on the microstructure and mechanical properties of Inconel 625 superalloy fabricated by laser solid forming was investigated. The microstructure of deposit was mainly composed of columnar grains, which didn't change until the solution temperature reached 1200 degrees C after solution heat treatment. Due to the large size Laves phase which can pin grain boundary and obstruct grain boundary migration, the recrystallization fully occurred when the solution temperature exceeded 1200 degrees C. With the increment of the solution temperature, the average diffusion coefficient of solute elements and the dissolution velocity increased obviously. Besides, the volume fraction and size of Laves phase decreased, and the dislocation density decreased apparently. As a result, the microhardness and yield strength decreased with the increment of the solution temperature, but the tensile strength didn't change much after solution heat treatment, and the elongation increased significantly with the solution temperature improving. The room-temperature tensile properties in different states of Inconel 625 fabricated by laser solid forming were higher than those of Inconel 625 fabricated by casting. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：330 / 344
页数：15
相关论文
共 40 条
  • [1] AARON HB, 1969, ACTA METALL MATER, V17, P407, DOI 10.1016/0001-6160(69)90021-2
  • [2] Microstructures and mechanical behavior of Inconel 718 fabricated by selective laser melting
    Amato, K. N.
    Gaytan, S. M.
    Murr, L. E.
    Martinez, E.
    Shindo, P. W.
    Hernandez, J.
    Collins, S.
    Medina, F.
    [J]. ACTA MATERIALIA, 2012, 60 (05) : 2229 - 2239
  • [3] [Anonymous], 1998, FUNDAMENTALS SOLIDIF
  • [4] [Anonymous], A494494M ASTM
  • [5] Numerical simulation of transport phenomena, formation the bead and thermal behavior in application to industrial DMD technology
    Bedenko, D. V.
    Kovalev, O. B.
    Smurov, I.
    Zaitsev, A. V.
    [J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2016, 95 : 902 - 912
  • [6] Functionally graded material of 304L stainless steel and inconel 625 fabricated by directed energy deposition: Characterization and thermodynamic modeling
    Carroll, Beth E.
    Otis, Richard A.
    Borgonia, John Paul
    Suh, Jong-ook
    Dillon, R. Peter
    Shapiro, Andrew A.
    Hofmann, Douglas C.
    Liu, Zi-Kui
    Beese, Allison M.
    [J]. ACTA MATERIALIA, 2016, 108 : 46 - 54
  • [7] Microstructural evolution of cold-sprayed Inconel 625 superalloy coatings on low alloy steel substrate
    Chaudhuri, Atanu
    Raghupathy, Y.
    Srinivasan, Dheepa
    Suwas, Satyam
    Srivastava, Chandan
    [J]. ACTA MATERIALIA, 2017, 129 : 11 - 25
  • [8] A modelling approach to yield strength optimisation in a nickel-base superalloy
    Collins, D. M.
    Stone, H. J.
    [J]. INTERNATIONAL JOURNAL OF PLASTICITY, 2014, 54 : 96 - 112
  • [9] Laser aided direct metal deposition of Inconel 625 superalloy: Microstructural evolution and thermal stability
    Dinda, G. P.
    Dasgupta, A. K.
    Mazumder, J.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 509 (1-2): : 98 - 104
  • [10] Solidification of Nb-bearing superalloys: Part I. Reaction sequences
    DuPont, JN
    Robino, CV
    Michael, JR
    Notis, MR
    Marder, AR
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (11): : 2785 - 2796
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