您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 4    August 2002

[PDF Download]    [Flash Online]

    

Effects of cyclic loading on temperature
evolution of ULTIMET superalloy:
experiment and theoretical modeling
L.Jiang1, H.Wang2, P.K.Liaw1, C.R.Brooks1, D.L.Klarstrom3

1. Department of Materials Science and Engineering, University of Tennessee,
 Knoxville, TN 37996, USA;
2. Metals and Ceramics Division, Oak Ridge National Laboratory,
Oak Ridge, TN 37831, USA;
3. Haynes International Inc., Kokomo, IN 46904, USA

Abstract:High-speed, high-resolution infrared thermography, as a non-contact, full-field, and nondestructive technique, was used to study the temperature variations of a cobalt-based ULTIMET alloy subjected to cyclic fatigue. During each fatigue cycle, the temperature oscillations, which were due to the thermal-elastic-plastic effects, were observed and related to stress—strain analyses. The change of temperature during fatigue was utilized to reveal the accumulation of fatigue damage. A constitutive model was developed for predicting the thermal and mechanical responses of ULTIMET alloy subjected to cyclic deformation. The model was constructed in light of internal-state variables, which were developed to characterize the inelastic strain of the material during cyclic loading. The predicted stress —strain and temperature responses were found to be in good agreement with the experimental results.

 

Key words: fatigue; thermography; temperature; constitutive model; NDE; superalloy

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn