Paper Titles
Characteristics of High Temperature Tensile Properties and Residual Stresses in Welded Joints of the SM570-TMCP Steel
p.527
Creep Model Based on Theta Projection and Omega Method for Predicting the Creep Behavior of Alloy
p.533
Segregation of Alloying Elements of Directionally Solidified Nickel Based Superalloy CM247LC during Creep Degradation Process
p.537
Artificial Neural Network Models for Predicting Flow Stress and Microstructure Evolution of a Hydrogenized Titanium Alloy
p.541
Fatigue Crack Growth Rate in Low ΔK Range According to the Microstructure and Temperature in P122 Alloy Weldment
p.545
Quantitative Characterization of Microstructure of Thermal Deformed TA15 Titanium Alloy by EBSD
p.549
Uniaxial Cyclic Deformation Behaviors of 42CrMo Steel with Different Heat-Treatments
p.555
Characteristics of Strength and Deformation of Inner/Outer Local Wall Thinned Straight Pipes
p.559
Comparison of the Tensile Performance of Polymer PC and PC/ABS
p.563

Fatigue Crack Growth Rate in Low ΔK Range According to the Microstructure and Temperature in P122 Alloy Weldment

Article Preview

Abstract:

There exists strong environmental and economic pressure to increase the thermal efficiency of fossil fuel power stations and this has led to a steady increase in operating temperature and pressure resulting in the world wide construction plans for ultra super-critical power plants. Consequently, in order to improve the thermal efficiency of power plant, there has been a strong drive to develop more advanced heat resistant steels with excellent creep, high temperature fatigue and thermal fatigue resistant properties as well as superior oxidation and corrosion resistant properties. In this study, the test material was P122 alloy which was developed for ultra super-critical power plant. To measure the fatigue crack growth rate in low #K range, fatigue tests were performed on the P122 alloy welds by #K decreasing method at three different microstructure (Base metal, HAZ, Weld metal) regions. Microstructure observation and micro-hardness tests performed for all three regions to find the relationship among the crack growth rate, microstructure and hardness. Fatigue tests were performed with compact tension specimens at 600°C, 650°C and 700°C at the loading frequency of 20Hz.

You might also be interested in these eBooks
Progresses in Fracture and Strength of Materials and Structures View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Pages:

545-548

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.353-358.545

Citation:

Cite this paper

Online since:

September 2007

Authors:

Si Yon Bae, Bum Joon Kim, Byeong Soo Lim

Keywords:

Fatigue, Heat Affected Zone (HAZ), High-Temperature, P122, Weldment

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] M. Tabuchi, T. Watanabe, K. Kubo, M. Matsui, J. Kinugawa and F. Abe: International Journal of Pressure Vessels and Piping 78, (2001) p.779.

DOI: 10.1016/s0308-0161(01)00090-4

Google Scholar

[2] B.S. Lim and C.S. Jeong: KeyEngineering Materials Vol. 261-263, (2004) p.1319.

Google Scholar

[3] A.K. Ray, Y.N. Tiwari, S. Chaudhuri: Engineering Failure Analysis 7, (2000) p.393.

Google Scholar

[4] S.H. Ryu, J.T. Kim: KSME Technical Division Conferences, Material and fracture division (2002).

Google Scholar

[5] B.S. Lim, C.S. Jeong and Y.T. Keum: Met. Mater. - Int. Vol. 9, (2003) p.543.

Google Scholar

[6] J.H. Kim, Y.J. Oh, I.S. Hwang, D.J. Kim and J.T. Kim: J. Nuclear Mater. 299, (2001) p.132.

Google Scholar

[7] K.B. Yoon, K.W. Kim and U.B. Baek: J. KSME A. Vol. 22, (1998) p.2153.

Google Scholar

[8] B.J. Kim, S.H. Ryu and B.S. Lim: Met. Mater. - Int. Vol. 9, (2004) p.19.

Google Scholar

[9] H.S. Shin, J.H. Kim, J.H. Hong and I.S. Chung: J. Kor. Met & Mater Vol. 37, (1999) p.1260.

Google Scholar

[10] Y.H. Lee, K.C. Lee, E.P. Yoon, K.C. Kim: J. KWS Vol. 10, (1992) p.40.

Google Scholar