naa a22 4500 510823955 CHVBK 20180411083547.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s12541-013-0177-9 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0177-9 FE-simulation coupled with CFD analysis for prediction of residual stresses relieved by cryogenic heat treatment of Al6061 tube [Elektronische Daten] [Dae-Hoon Ko, Dae-Cheol Ko, Hak-Jin Lim, Jung-Min Lee, Byung-Min Kim] This study aims to predict the residual stress relieved by cryogenic heat treatment (CHT) of an Al6061 tube. Conventional CHT commonly consists of solid-solution heat treatment, uphill quenching, and artificial ageing. To produce a new residual stress that is opposite to the original in nature, the solid-solution heat-treated aluminum parts are usually immersed in LN2 during uphill quenching with conventional CHT, followed by rapid heating of the parts using boiling water or high-velocity steam. First of all, conventional T6 and CHT experiments are conducted to measure the temperature of a tube with dimensions Ø200 mm × h200 mm × t10 mm. Computational fluid dynamics (CFD) analysis is conducted to calculate the convective heat transfer coefficient and temperature of the tube. These results are compared with the temperature in the experiment, and the comparison results are used to predict residual stress by means of FE-simulation. In particular, the relaxation of residual stress during artificial ageing is investigated using the Zener-Wert-Avrami function with the user subroutine. The predicted values of residual stress are compared favorably with the experimental results within a deviation of 10-15%, in contrast to measurements obtained by micro-indentation and saw-cutting tests. In addition, the experimental results show that conventional CHT can relieve as much as 57% of the residual stress induced by the water quenching of conventional T6 heat treatment. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Residual stress nationallicence Cryogenic heat treatment nationallicence Uphill quenching nationallicence Zener-wert-avrami function nationallicence Micro-indentation nationallicence Saw-cutting test nationallicence Ko Dae-Hoon Precision Manufacturing System Division, Pusan National University, Geumjeong-gu, 609-735, Busan, South Korea aut Ko Dae-Cheol Industrial Liaison Innovation Center, Pusan National University, Geumjeong-gu, 609-735, Busan, South Korea aut Lim Hak-Jin Defense Product Technical Research Laboratory, Poongsan Co., 780-805, Kyung-buk, Kyung-ju, South Korea aut Lee Jung-Min Defense Product Technical Research Laboratory, Poongsan Co., 780-805, Kyung-buk, Kyung-ju, South Korea aut Kim Byung-Min Department of Mechanical Engineering, Pusan National University, Geumjeong-Gu, 609-735, Busan, South Korea aut International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/8(2013-08-01), 1301-1309 2234-7593 14:8<1301 2013 14 12541 https://doi.org/10.1007/s12541-013-0177-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0177-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ko Dae-Hoon Precision Manufacturing System Division, Pusan National University, Geumjeong-gu, 609-735, Busan, South Korea aut NATIONALLICENCE 700 1- Ko Dae-Cheol Industrial Liaison Innovation Center, Pusan National University, Geumjeong-gu, 609-735, Busan, South Korea aut NATIONALLICENCE 700 1- Lim Hak-Jin Defense Product Technical Research Laboratory, Poongsan Co., 780-805, Kyung-buk, Kyung-ju, South Korea aut NATIONALLICENCE 700 1- Lee Jung-Min Defense Product Technical Research Laboratory, Poongsan Co., 780-805, Kyung-buk, Kyung-ju, South Korea aut NATIONALLICENCE 700 1- Kim Byung-Min Department of Mechanical Engineering, Pusan National University, Geumjeong-Gu, 609-735, Busan, South Korea aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Springer Berlin Heidelberg 14/8(2013-08-01), 1301-1309 2234-7593 14:8<1301 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer