The Microstructure Evolution and Control of Alloy 690 during Cold Rolling

Abstract:

The microstructure evolution and control for Alloy 690 during cold rolling and annealing treatment was investigated. Cold rolling specimens were deformed in the strain range from 15% to 70% with strain rates from 0.01 to 10s^-1. Subsequent annealing treatment was carried out in the range of 1060~1100°C for dwell time 3~15mins. Rolling reduction, annealing temperature and annealing time except strain rate had obviously influence on grain size and hardness. Little coarsening of grains were observed below 1060°C during annealing treatment, whereas grains coarsened obviously over 1080°C. Besides, the behavior of grain growth for alloy 690 was investigated systematically.

• Periodical: Key Engineering Materials (Volume 573)
• Pages: 95-103
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.573.95
• Online since: September 2013
• Authors: Zhi Hao Yao, Jian Xin Dong, Zhi Yong He, Mai Cang Zhang
• Keywords: Cold Rolling, Heat Treatment, Hot Extrusion, Ni-Based Alloy 690, Tubes

References

[1] R.S. Dutta, A. Lobo, R. Purandare, S.K. Kulkarni, and G. K. Dey. Corrosion behavior of austenitic alloy 690 under anodic and cathodic potentials[J]. Metallurgical and Materials Transactions A, 2002, 33A: 1437-1447.

DOI: 10.1007/s11661-002-0067-8

[2] J.R. Crum, R.C. Scarberry. Corrosion testing of INCONEL alloy 690 for PWR steam generators[J]. Materials for Energy Systems, 1982, 4(3): 125-130.

DOI: 10.1007/bf02833403

[3] Lee W S，Liu C Y，Sun T N．Deformation behavior of Inconel 690 superalloy evaluated by impact test[J]. Journal of Materials Processing Technology, 2004, 153: 219-225.

DOI: 10.1016/j.jmatprotec.2004.04.275

[4] C.J. Boehlert, The effect of thermo mechanical processing on the creep behavior of alloy 690, Materials Science and Engineering A, 2008, 473: 233-237.

DOI: 10.1016/j.msea.2007.03.082

[5] Sakai T. Dynamic recrystallization microstructures under hot working conditions[J]．Journal of Materials Processing Technology, 1995, 53: 349-361.

DOI: 10.1016/0924-0136(95)01992-n

[6] B.A. Young, Xiaosheng Gao, T.S. Srivatsan, Peter J. King. An investigation of the fatigue crack growth behavior of INCONEL 690[J]. Materials Science & Engineering A, 2006, 416: 187-191.

DOI: 10.1016/j.msea.2005.09.101

[7] M. Casales, V.M. Salinas-Bravo, A. Martinez-Villafane, J.G. Gonzalez-Rodriguez. Effect of heat treatment on the stress corrosion cracking of alloy 690[J]. Materials Science & Engineering A, 2002, 332: 223-230.

DOI: 10.1016/s0921-5093(01)01747-6

[8] J.J. Kai, G.P. Yu, C.H. Tsai, M.N. Liu, S.C. Yao. The effects of heat treatment on the chromium depletion, precipitate evolution, and corrosion resistance of INCONEL alloy 690[J]. Metallurgical and Materials Transactions A, 1989, 20A: 2057-(2067).

DOI: 10.1007/bf02650292

[9] Sui G, Titchmarsh J M, Heys G B, Congleton J. Stress corrosion cracking of alloy 600 and alloy 690 in hydrogen Steam at 380 ℃[J]. Corrosion Science, 1997, 39(3): 565-587.

DOI: 10.1016/s0010-938x(97)86103-3

[10] Zhang Chuangsong, Zheng Wenjie, Song Zhigang, et al. Effect of cold deformation on structure and mechanical behavior of Inconel 690 alloy[J]. Journal of Iron and Steel Research. 2009, 21(12): 49-54.

[11] Sellars C M, Whiteman J A. Recrystallization and grain growth in hot rolling[J]. Metal Science, 1979, 13(4): 187-194.

DOI: 10.1179/msc.1979.13.3-4.187

[12] Anelli E. Application of mathematical modeling to hot rolling and controlled cooling of wire rods and bars[J]. ISIJ International, 1992, 32(3): 440-449.

DOI: 10.2355/isijinternational.32.440

[13] Chen Liqing, Sui Fengli, Liu Xianghua. Grain growth model of Inconel 718 alloy forged slab in reheating process prior to rough rolling[J]. Acta Metallurgica Sinica, 2009, 45(10): 1242-1248.