Effect of Heat Treatment on the Microstructure and Mechanical Properties of the Modified 718 Alloy

被引：17
作者：
Han, Da-Wei [1 ]
Yu, Lian-Xu [2 ]
Liu, Fang [3 ]
Zhang, Bin [1 ]
Sun, Wen-Ru [3 ]
机构：
[1] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China
[2] Chongqing Skyrizon Aeroengine Co Ltd, Chongqing 401135, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2018年 / 31卷 / 11期
关键词：
Heat treatment; Mo; 718; alloy; Microstructure; Mechanical properties; GRAIN-BOUNDARY MICROCHEMISTRY; STRESS-RUPTURE PROPERTIES; ATOM-PROBE TOMOGRAPHY; DEFORMATION-BEHAVIOR; IN718; SUPERALLOY; PRECIPITATION; PHASE; PHOSPHORUS; STABILITY; ASTROLOY;
D O I：
10.1007/s40195-018-0790-9
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
M718 alloy with an extra high Mo content of 7.50wt% which reduced Nb addition and increased Al and Ti additions within the composition specifications of 718 alloy has been designed to increase the service temperature of 718 alloy. And the effect of the heat treatment on the microstructure and mechanical properties of M718 alloy has been investigated in this study. The results showed that Laves phase precipitated on the grain boundaries of M718 alloy instead of -Ni3Nb phase in 718 alloy, and and phases precipitated in the matrix of M718 alloy as that in 718 alloy. Increasing the solution temperature from 960 to 1050 degrees C noticeably reduced the intergranular precipitation of Laves phase. The precipitation of Laves phase was appropriate at 1020 degrees C for improving the grain boundary cohesion. Increasing the two-stage aging temperatures markedly increased the sizes of and phases. As a result, the strength of M718 alloy increased.
引用
收藏
页码：1224 / 1232
页数：9
相关论文
共 43 条
[1]   δ Phase precipitation in Inconel 718 and associated mechanical properties [J].
Anderson, M. ;
Thielin, A. -L. ;
Bridier, F. ;
Bocher, P. ;
Savoie, J. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 679 :48-55
[2]  
[Anonymous], 2002, CHIN HDB AER MAT, P536
[3]   INFLUENCE OF IRON AND ALUMINUM ON KINETICS OF PRECIPITATION IN NI-TA ALLOYS [J].
AXTER, SE ;
POLONIS, DH .
MATERIALS SCIENCE AND ENGINEERING, 1978, 36 (01) :71-79
[4]   EFFECT OF MOLYBDENUM ON GAMMA' COARSENING AND ON ELEVATED-TEMPERATURE HARDNESS IN SOME EXPERIMENTAL NICKEL-BASE SUPERALLOYS [J].
BISS, V ;
SPONSELLER, DL .
METALLURGICAL TRANSACTIONS, 1973, 4 (08) :1953-1960
[5]   Atomic-scale APFIM and TEM investigation of grain boundary microchemistry in astroloy nickel base superalloys [J].
Blavette, D ;
Duval, P ;
Letellier, L ;
Guttmann, M .
ACTA MATERIALIA, 1996, 44 (12) :4995-5005
[6]   Atom probe tomography investigation of the microstructure of superalloys N18 [J].
Cadel, E ;
Lemarchand, D ;
Chambreland, S ;
Blavette, D .
ACTA MATERIALIA, 2002, 50 (05) :957-966
[7]   Deformation behavior of hot-rolled IN718 superalloy under plane strain compression at elevated temperature [J].
Cheng, Liang ;
Xue, Xiangyi ;
Tang, Bin ;
Liu, Degui ;
Li, Jizhen ;
Kou, Hongchao ;
Li, Jinshan .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 606 :24-30
[8]   THE EFFECT OF VARYING AL, TI, AND NB CONTENT ON THE PHASE-STABILITY OF INCONEL-718 [J].
COLLIER, JP ;
SONG, HW ;
PHILLIPS, JC ;
TIEN, JK .
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1988, 19 (07) :1657-1666
[9]   MORPHOLOGY OF Y' AND Y'' PRECIPITATES AND THERMAL-STABILITY OF INCONEL 718 TYPE ALLOYS [J].
COZAR, R ;
PINEAU, A .
METALLURGICAL TRANSACTIONS, 1973, 4 (01) :47-59
[10]   Multiscale modeling of the mechanical behavior of IN718 superalloy based on micropillar compression and computational homogenization [J].
Cruzado, A. ;
Gan, B. ;
Jimenez, M. ;
Barba, D. ;
Ostolaza, K. ;
Linaza, A. ;
Molina-Aldareguia, J. M. ;
Llorca, J. ;
Segurado, J. .
ACTA MATERIALIA, 2015, 98 :242-253
12345