CREEP CRACK PROPAGATION IN CONVENTIONAL CAST AND DIRECTIONALLY SOLIDIFIED SUPERALLOY RENE 80

Abstract

Abstract: The creep crack propagation in superalloy René80 of two different microstructures,i.e., equiaxed grain structure by conventional casting and columnar grain by directional solidification,was investigated under static load at 1123 K.The creep crack growth rate, da/dt,seems to be correlated with the stress intensity factor,K.The creep crack growth rate in the directionally solidified alloy is lower than that in the conventional cast alloy,owing to the elimination of transverse grain boundaries.The effect of microstructure on creep crack propagation has also been discussed.

Key words: Superalloy René 80, directional solidification, stress intensity factor, creep crack propagation

SUN Jian ZHANG Yuanhu HU Gengxiang Shanghai Jiaotong University,Shanghai,China SUN Jian,lecturer,Department of Materials Science,Shanghai Jiaotong University,Shanghai 200030,China. CREEP CRACK PROPAGATION IN CONVENTIONAL CAST AND DIRECTIONALLY SOLIDIFIED SUPERALLOY RENE 80[J]. Acta Metallurgica Sinica (English Letters), 1993, 6(5): 343-345.

[1]	Yue-Ling Guo, Li-Na Jia, Hua-Rui Zhang, Bin Kong, Yong-Lin Huang, Hu Zhang. Microstructure and High-Temperature Oxidation Behavior of Dy-Doped Nb-Si-Based Alloys [J]. Acta Metallurgica Sinica (English Letters), 2018, 31(7): 742-752.
[2]	Si-Yu Sun, Qiao-Dan Hu, Wen-Quan Lu, Zong-Ye Ding, Ming-Qin Xu, Ming-Xu Xia, Jian-Guo Li. In situ Study on the Growth Behavior of Primary Al₃Ni Phase in Solidifying Al-Ni Alloy by Synchrotron Radiography [J]. Acta Metallurgica Sinica (English Letters), 2018, 31(6): 668-672.
[3]	Hong-Min Jia, Xiao-Hui Feng, Yuan-Sheng Yang. Microstructure Evolution and Growth Orientation of Directionally Solidified Mg-4 wt% Zn Alloy with Different Growth Rates [J]. Acta Metallurgica Sinica (English Letters), 2017, 30(12): 1185-1191.
[4]	Shu Chen, Jiu-Zhou Zhao, Hong-Xiang Jiang, Jie He. Microstructure Evolution of a Ternary Monotectic Alloy During Directional Solidification [J]. Acta Metallurgica Sinica (English Letters), 2015, 28(3): 316-321.
[5]	Shaojun Liu, Guangyu Yang, Wanqi Jie. Microstructure, Microsegregation, and Mechanical Properties of Directional Solidified Mg-3.0Nd-1.5Gd Alloy [J]. Acta Metallurgica Sinica (English Letters), 2014, 27(6): 1134-1143.
[6]	Wang Lingshui, Shen Jun, Xiong Yilong, Du Yujun, Fu Hengzhi. Phase and Microstructure Selection During Directional Solidification of Peritectic Alloy Under Convection Condition [J]. Acta Metallurgica Sinica (English Letters), 2014, 27(4): 585-592.
[7]	Masood Shah, Catherine Mabru, Farhad Rezai-Aria, Ines Souki,Riffat Asim Pasha. An estimation of stress intensity factor in a clamped SE(T) specimen through numerical simulation and experimental verification: case of FCGR of AISI H11 tool steel [J]. Acta Metallurgica Sinica (English Letters), 2012, 25(4): 307-319.
[8]	Jianbo YU,Zhongming REN,Weili REN,Kang DENG,Yunbo ZHONG. Effects of electromagnetic vibration on the structure and mechanical properties of Al-6%Si alloy during directional solidification [J]. Acta Metallurgica Sinica (English Letters), 2009, 22(1): 35-39.
[9]	Z.M. Zhang, T. Lu, C.J. Xu, X.F. Guo. MICROSTRUCTURE OF BINARY Mg-Al EUTECTIC ALLOY WIRES PRODUCED BY THE OHNO CONTINUOUS CASTING PROCESS [J]. Acta Metallurgica Sinica (English Letters), 2008, 21(4): 275-281 .
[10]	D.H.Kim. EFFECT OF CARBON AND BORON ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A SINGLE CRYSTAL SUPERALLOY RR 2072 [J]. Acta Metallurgica Sinica (English Letters), 2005, 18(1): 33-38 .
[11]	J. Feng,W.D. Huang,X. Lin,T. Li,Y.F. Xue and Y.H. Zhou(State Key Lab. of Solidilication Processing, Northwestern Polytechnical University, Xi'an 710072, China). CELLULAR SPACING SELECTION OF Al-0.53wt%Zn ALLOY UNDER NEAR-RAPID DIRECTIONAL SOLIDIFICATION CONDITION [J]. Acta Metallurgica Sinica (English Letters), 1998, 11(5): 320-324.
[12]	W. H. JIANG; X.D. YAO; H.R. GUAN; and Z. Q. HU(Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110015, China)(Shenyang Polytechnic University, Shenyang 110023, China). HIGH TEMPERATURE FATIGUE BEHAVIOUR OF A DIRECTIONALLY SOLIDIFIED COBALT-BASE SUPERALLOY [J]. Acta Metallurgica Sinica (English Letters), 1998, 11(2): 111-115.
[13]	H.Z. Fu; X.G. Gen;J.G. Li and J.Zhang(State Key Lab.of Solidification Processing, Northwestern Polytechnical University,Xi'an 710072,China Manuscript received 26 August 1996). NEAR RAPID DIRECTIONAL SOLIDIFICATION AND ITS SUPERFINE MICROSTRUCTURE [J]. Acta Metallurgica Sinica (English Letters), 1996, 9(6): 497-502.
[14]	J.H Lee;J. Chen;S.J. Choe;Y.T. Lee and H.M. Kim(High Temperature Materials Laboratory, Korea Institute of Machinery & Materials, 66 Sangnam Dong,Changwon, Kyungnam,641010, Korea Manuscript received 26 August 1996). A STUDY OF CARBIDE GROWTH IN MAR-M247 LC ALLOY BY DIRECTIONAL SOLIDIFICATION METHOD [J]. Acta Metallurgica Sinica (English Letters), 1996, 9(6): 509-514.
[15]	S.P. Li; S.X. Zhao; M.X Pan;D.Q. Zhao; and X.C.Chen (Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China). MORPHOLOGY AND ORIENTATION CHARACTERISTICS OF DIRECTIONALLY SOLIDIFIED α(A1)-Mg_2Si EUTECTIC [J]. Acta Metallurgica Sinica (English Letters), 1996, 9(5): 323-328.

CREEP CRACK PROPAGATION IN CONVENTIONAL CAST AND DIRECTIONALLY SOLIDIFIED SUPERALLOY RENE 80

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments