Microstructure evolution and enhancement of fracture toughness of NiAl-Cr(Mo)-(Hf,Dy) alloy with a small addition of Fe during heat treatment

被引：46
作者：
Wang, Lei [1 ]
Shen, Jun [1 ]
Shang, Zhao [1 ]
Fu, Hengzhi [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
SCRIPTA MATERIALIA | 2014年 / 89卷
基金：
中国国家自然科学基金;
关键词：
Toughness; Solidification microstructure; NiAl-Cr(Mo)-(Hf; Dy)-4Fe eutectic alloy; Directional solidification; Isothermal heat treatment; DIFFERENT WITHDRAWAL RATES; MECHANICAL-PROPERTIES; EUTECTIC ALLOY; COMPRESSIVE PROPERTIES; DY; SOLIDIFICATION; DUCTILITY; PROPERTY; STRENGTH; HIP;
D O I：
10.1016/j.scriptamat.2014.07.002
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructure evolution and room temperature fracture toughness of NiAl-Cr(Mo)-(Hf,Dy)-4Fe alloy during heat treatment have been investigated. After heat treatment (1250 degrees C), the NiAl and Cr(Mo) phases become coarse, and a local dissolution occurs in Cr(Mo) lamellae. Simultaneously, fine Hf solid solution appears at the NiAl/Cr(Mo) phase interface. Moreover, the addition of Fe can improve the fracture toughness of NiAl-Cr(Mo)-(Hf,Dy) alloy, and heat treatment can enhance fracture toughness further. The relevant toughness mechanism is also discussed. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1 / 4
页数：4
相关论文
共 22 条
  • [1] Deformation behavior and microstructure of DS NiAl/Cr(Mo) alloy containing Hf
    Cui, CY
    Guo, JT
    Qi, YH
    Ye, HQ
    [J]. INTERMETALLICS, 2002, 10 (10) : 1001 - 1009
  • [2] High temperature embrittlement of NiAl alloy induced by hot isostatic pressing (HIPing) and aging
    Cui, CY
    Guo, JT
    Qi, YH
    Ye, HQ
    [J]. SCRIPTA MATERIALIA, 2001, 44 (10) : 2437 - 2441
  • [3] Cui Z. Q., 2010, METALLOGRAPHY HEAT T, P242
  • [4] Assessment of the Fe-Ni-Al system
    Eleno, Luiz
    Frisk, Karin
    Schneider, Andre
    [J]. INTERMETALLICS, 2006, 14 (10-11) : 1276 - 1290
  • [5] The microstructure and compressive properties of as-cast NiAl-28Cr-5.8Mo-0.2Hf containing minor Dy
    Gao, Q
    Guo, JT
    Huai, KW
    Zhang, JS
    [J]. MATERIALS LETTERS, 2005, 59 (23) : 2859 - 2862
  • [6] Effect of withdrawal rate on microstructure and mechanical properties of a directionally solidified NiAl-based hypoeutectic alloy doped with trace Hf and Ho
    Guo, J. T.
    Xie, Y.
    Sheng, L. Y.
    Zhou, L. Z.
    Liang, Y. C.
    [J]. INTERMETALLICS, 2011, 19 (02) : 206 - 211
  • [7] Microstructure, interface and mechanical property of the DS NiAl/Cr(Mo,Hf) composite
    Guo, JT
    Cui, CY
    Chen, YX
    Li, DX
    Ye, HQ
    [J]. INTERMETALLICS, 2001, 9 (04) : 287 - 297
  • [8] PROCESSING AND MECHANICAL-PROPERTIES OF IN-SITU COMPOSITES FROM THE NIAL-CR AND THE NIAL-(CR,MO) EUTECTIC SYSTEMS
    JOHNSON, DR
    CHEN, XF
    OLIVER, BF
    NOEBE, RD
    WHITTENBERGER, JD
    [J]. INTERMETALLICS, 1995, 3 (02) : 99 - 113
  • [9] Effect of alloying on electronic structure, strength and ductility characteristics of nickel aluminide
    Kovalev, AI
    Barskaya, RA
    Wainstein, DL
    [J]. SURFACE SCIENCE, 2003, 532 : 35 - 40
  • [10] Effect of growth rate on the tensile properties of DS NiAl/Cr(Mo) eutectic alloy produced by liquid metal cooling technique
    Liang, Y. C.
    Guo, J. T.
    Xie, Y.
    Sheng, L. Y.
    Zhou, L. Z.
    Hu, Z. Q.
    [J]. INTERMETALLICS, 2010, 18 (03) : 319 - 323
123