Thermal response of DP600 dual-phase steel under ultrasonic fatigue loading

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:677

Article

Torabian, Noushin^1,2  Favier, Veronique¹  Ziaei-Rad, Saeed²  Dirrenberger, Justin¹  Adamski, Frederic¹  Ranc, Nicolas¹ 

[1] CNRS, Lab PIMM, Arts & Metiers Paris Tech, CNAM, F-75013 Paris, France

[2] Isfahan Univ Technol, Dept Mech Engn, Esfahan 8415683111, Iran

关键词: Ultrasonic fatigue;    Infrared thermography;    Dual-phase steel;    Ferrite;    Dissipative mechanisms;    Dislocations;   

DOI  :  10.1016/j.msea.2016.09.025

来源: Elsevier

【 摘 要 】

The present work employed in situ infrared thermography to investigate the thermal response and dissipative mechanisms of a dual-phase steel under ultrasonic tension-compression fatigue testing. A classical thermal response occurred for stress amplitudes below 247 MPa but an abnormal thermal response was observed for stress amplitudes above 247 MPa, in that the temperature stabilized after a steep increase of up to similar to 350 degrees C. The mean dissipated energy per cycle was estimated based on temperature measurements using the heat diffusion equation. The relationship between the mean dissipated energy per cycle and the stress amplitude was studied, and mechanisms related to the observed thermal response were discussed. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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