Effects of Heat Transfer Coefficients on Quenching Residual Stresses in 7055 Aluminum Alloy

Abstract:

The quenching process can produce great residual stresses in 7055 aluminum alloy plates. The main factor that affects the quenching residual stresses is the heat transfer coefficient in the quenching process. In this paper, the heat transfer coefficients of spray quenching under different spray water flows were measured by using the inverse method, and the heat transfer coefficients of immersion quenching under different water temperatures were measured by the iterative method. The heat transfer coefficient increases as the spray water flow increases while decreases as the water temperature increases. The basic differences of water temperatures/spray water flows/quenching methods are the different heat transfer coefficients. According to the heat transfer coefficients results of immersion and spray quenching, an orthogonal test was carried out to study the effects of heat transfer coefficients in different temperature regions on the quenching residual stresses. The heat transfer coefficients in the range of 100oC ~200oC have a great influence on the quenching residual stresses, especially for the heat transfer coefficient near 150oC.

• Periodical: Materials Science Forum (Volume 877)
• Pages: 647-654
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.877.647
• Online since: November 2016
• Authors: Ya Nan Li, Yong An Zhang*, Xi Wu Li, Zhi Hui Li, Guo Jun Wang, Hong Wei Yan, Long Bing Jin, Bai Qing Xiong
• Keywords: Aluminium Alloy, FEM Simulation, Heat Transfer Coefficients, Quenching Residual Stresses

References

[1] J.S. Robinson, R.L. Cudd , D. A Tanner, G. P Dolan. Quench sensitivity and tensile property inhomogeneity in 7010 forgings, Journal of Materials Processing Technology. 119 (2001) 261-267.

DOI: 10.1016/s0924-0136(01)00927-x

[2] V. C Prantil, M. L Callabresi, J. F Lathrop, G. S Ramaswamy, M. T Lusk, Simulating distortion and residual stresses in carburized thin strips. Journal of Engineering Materials and Technology. 125 (2003) 116-124.

DOI: 10.1115/1.1543973

[3] D Godard, P Archambault, E Aeby-gautier, G Lapasset, Precipitation sequences during quenching of the AA 7010 alloy, Acta Materialia. 50 (2002) 2319-2329.

DOI: 10.1016/s1359-6454(02)00063-0

[4] J. S Robinson, D. A Tanner, C. E Truman, A. M Paradowska, R. C Wimpory, The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075, Materials Characterization. 65 (2012) 73-85.

DOI: 10.1016/j.matchar.2012.01.005

[5] H Gong, Y. X Wu, K Liao, Influence of different quenching techniques on residual stress of 7075 aluminum alloy thick-plate, Journal of Central South University. 41 (2010) 1354-1359.

[6] J. S Robinson, D. A Tanner, C. E Truman, 50th Anniversary Article: The origin and management of residual stress in heat-treatable aluminium alloys, Strain. 50 (2014) 185-207.

DOI: 10.1111/str.12091

[7] M. J Wang, G Yang, C. Q Huang, B Chen, Simulation of temperature and stress in 6061 aluminum alloy during online quenching process, Transactions of Nonferrous Metals Society of China. 24 (2014) 2168-2173.

DOI: 10.1016/s1003-6326(14)63328-8

[8] Z. H Zhang, W. P Wang, H. D Fu, J. X Xie, Effect of quench cooling rate on residual stress, microstructure and mechanical property of a Fe–6. 5 Si alloy, Materials Science and Engineering: A. 530 (2011) 519-524.

DOI: 10.1016/j.msea.2011.10.013

[9] X. W Yang, J. C Zhu, Z. H Lai, Y Liu, D He, Z. S Nong, Finite element analysis of quenching temperature field, residual stress and distortion in A357 aluminum alloy large complicated thin-wall workpieces, Transactions of Nonferrous Metals Society of China. 23 (2013).

DOI: 10.1016/s1003-6326(13)62657-6

[10] S Masoudi, G Amirian, E Saeedi, M Ahmadi, The effect of quench-induced residual stresses on the distortion of machined thin-walled parts, Journal of Materials Engineering and Performance. 24 (2015) 3933-3941.

DOI: 10.1007/s11665-015-1695-7

[11] A Cho, K. P Smith, V Dangerfield, A high strength, heat treatable aluminium alloy: CA, CA 2657331 A1. (2008).

[12] Y. B Dong, W. Z Shao, L. X Lu, J. T Jiang, L Zhen. Numerical simulation of residual stress in an Al-Cu Alloy block during quenching and aging, Journal of Materials Engineering and Performance. 24 (2015) 4928-4940.

DOI: 10.1007/s11665-015-1758-9

[13] Y. B DONG, W. Z Shao, J. T Jiang, B. Y Zhang, L Zhen, Minimization of residual stress in an Al-Cu Alloy forged plate by different heat treatments, Journal of Materials Engineering and Performance. 24 (2015) 1-10.

DOI: 10.1007/s11665-015-1505-2

[14] P Ulysse, Thermo-mechanical characterization of forged coated products during water quench, Journal of Materials Processing Technology. 209 (2009) 5584-5592.

DOI: 10.1016/j.jmatprotec.2009.05.015

[15] P Ulysse, R. W Schultz, The effect of coatings on the thermo-mechanical response of cylindrical specimens during quenching, Journal of Materials Processing Technology. 204 (2008) 39-47.

DOI: 10.1016/j.jmatprotec.2007.10.072

[16] B. W Xiao, Q. G Wang, P Jadhav, K. Y Li, An experimental study of heat transfer in aluminum castings during water quenching, Journal of Materials Processing Technology. 210 (2010) 2023-(2028).

DOI: 10.1016/j.jmatprotec.2010.07.026

[17] G. P Dolan, J. S Robinson, Residual stress reduction in 7175-T73, 6061-T6 and 2017A-T4 aluminum alloys using quench factor analysis, Journal of Materials Processing Technology. 153 (2004) 346-351.

DOI: 10.1016/j.jmatprotec.2004.04.065

[18] J. S Robinson, R. L Cudd, D. A Tanner, Thermal stress relief in AA2014 and AA7050 forgings / Proceedings of 15th International Conference on Production Research. Ireland: University of Limerick. (1999) 535-538.