Search

Occasional Topics
OTjapan Measures for Tsunami Striking Nuclear Power Station in Japan
Special Article: The Great Tohoku Earthquake (1)
OTjapan The Tragedy of “To Be” Principle in the Japanese Nuclear Industry
EJAMOT_CN3_Figure1_The_outside_view_of_CEFR OTChinaPlanning and Consideration on SFR R&D Activities in China
< All Occasional Topics

Information
ICMST-Kobe 2014
Nov 2(Sun) - 5(Wed), 2014
Kobe, Japan
Nuclear Regulation Authority Outline of the New Safety Standards for Light Water Reactors for Electric Power Generation
For Public Comment
Outline of New Safety Standard (Design Basis)
For Public Comment
New Safety Standards (SA) Outline (Draft)
For Public Comment
Outline of New Safety Standard(Earthquake and Tsunami)(DRAFT)
Issues
 

Vol.6 No.2(Aug-25)
Vol.6 No.1(May-25)
Vol.5 No.4(Feb-25)
Vol.5 No.3(Nov-25)
Vol.5 No.2(Aug-26)

< Other Issues

Featured Articles
EJAM6-2NT65 Blockage Monitoring Method of SG Tube Support Plate with Intelligent ECT"

JSM
Contacts
(EJAM): ejam@jsm.or.jp
(JSM): secretariat@jsm.or.jp
HP: http://www.jsm.or.jp
(in English)

 

Vol.6 No.2 previous AA 77 NT65

Academic Articles
Regular Paper Vol.6No.2 (2014) p.34 - p.47
 

Hardness Prediction of HAZ in Temper Bead Welding by Non-Consistent Layer Technique

 
Lina YU1*, Kazuyoshi SAIDA1, Masahito MOCHIZUKI1, Masashi KAMEYAMA2, Naoki CHIGUSA3 and Kazutoshi NISHIMOTO4
 
1Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
2Japan Nuclear Safety Institute, 5-36-7 Shiba, Minato-ku, Tokyo 108-0014, Japan
3The Kansai Electric Power Co., Inc., 8 Yokota, 13 Goichi, Mihama-cho, Mikata-gun, Fukui 919-1141, Japan
4Fukui University of Technology, Gakuen 3-6-1, Fukui-shi, Fukui 910-8505, Japan
 
Abstract
Based on the experimentally obtained hardness database, the neural network-based hardness prediction system of heat affect zone (HAZ) in temper bead welding by Consistent Layer (CSL) technique has been constructed by the authors. However in practical operation, CSL technique is sometimes difficult to perform because of difficulty of the precise heat input controlling, and in such case non-CSL techniques are mainly used in the actual repair process. Therefore in the present study, the neural network-based hardness prediction system of HAZ in temper bead welding by non-CSL techniques has been constructed through thermal cycle simplification, from the view of engineering. The hardness distribution in HAZ with non-CSL techniques was calculated based on the thermal cycles numerically obtained by finite element method. The experimental result has shown that the predicted hardness is in good accordance with the measured ones. It follows that the currently proposed method is effective for estimating the tempering effect during temper bead welding by non-CSL techniques.
 
Keywords
Hardness, Temper bead welding, Consistent layer technique, Low-alloy steel, FEM
 
Full Paper: PDF EJAM Vol.6 No.2 pp.34-47 "Hardness Prediction of HAZ in Temper Bead Welding by Non-Consistent Layer Technique"















Article Information
Article history:
Received 18 April 2014
Accepted 15 July 2014