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	Non-Fourier heat conduction effects during high-energy beam metalworking
	Zhang Haiquan ; Zhang Yanhua ; Zhao Haiyan
	2010-05-10 ; 2010-05-10
关键词	Practical Theoretical or Mathematical/ electron beam welding heat conduction Laplace transforms metalworking/ nonFourier heat conduction effects high-energy density beam transient heat conduction high-energy beam metalworking ultrafast heating transient temperature response material relaxation times hyperbolic heat conduction equation Laplace transforms semiinfinite body heat flux boundary thermal shock surface temperature electron beam deep penetration welding/ A8140G Other heat and thermomechanical treatments A4410 Heat conduction (models, phenomenological description)
中文摘要	Non-Fourier heat conduction induced by ultrafast heating of metals with a high-energy density beam was analyzed. The non-Fourier effects during high heat flux heating were illustrated by comparing the transient temperature response to different heat flux and material relaxation times. Based on the hyperbolic heat conduction equation for the non-Fourier heat conduction law, the equation was solved using a hybrid method combining an analytical solution and numerical inversion of the Laplace transforms for a semi infinite body with the heat flux boundary. Analysis of the temperature response and distribution led to a criterion for the applicability of the non-Fourier heat conduction law. The results show that at a relatively large heat flux, such as greater than 10/sup 8/ W/cm/sup 2/ the heat-affected zone in the metal material experiences a strong thermal shock as the non-Fourier effects cause a large step increase in the surface temperature. The results provide a method for analyzing transient heat conduction problems using a high-energy density beam, such as electron beam deep penetration welding.
语种	英语 ; 英语
出版者	Editorial Board of J. of Tsinghua University ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/24037]
专题	清华大学
推荐引用方式 GB/T 7714	Zhang Haiquan,Zhang Yanhua,Zhao Haiyan. Non-Fourier heat conduction effects during high-energy beam metalworking[J],2010, 2010.
APA	Zhang Haiquan,Zhang Yanhua,&Zhao Haiyan.(2010).Non-Fourier heat conduction effects during high-energy beam metalworking..
MLA	Zhang Haiquan,et al."Non-Fourier heat conduction effects during high-energy beam metalworking".(2010).

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