Achieving Superior Superplasticity in a Mg-6Al-Zn Plate via Multi-pass Submerged Friction Stir Processing

doi:10.1007/s40195-021-01305-2

Abstract

Abstract:

A large-scale Mg-6Al-Zn plate was prepared by multi-pass submerged friction stir processing (M-SFSP) and its superplastic deformation behavior was investigated. The maximum elongation of 467%, 332% and 421% was attained for the samples oriented in the processing direction (PD), 45° tilted toward the PD, and transverse direction (TD), respectively, when deformed at 623 K and a strain rate of 1 × 10^-3 s^-1. This was attributed to the homogeneous and fine-grained structure with mostly high-angle grain boundaries facilitating the prevalent deformation mechanism of grain boundary sliding, along with the weakened texture and dynamic recrystallization during hot deformation.

Key words: Superplasticity, Magnesium alloy, Multi-pass friction stir processing, Microstructure, Texture

Xicai Luo, Haolin Liu, Limei Kang, Jielin Lin, Datong Zhang, Dongyang Li, Daolun Chen. Achieving Superior Superplasticity in a Mg-6Al-Zn Plate via Multi-pass Submerged Friction Stir Processing[J]. Acta Metallurgica Sinica (English Letters), 2022, 35(5): 757-762.

Figures/Tables 5

References 26

[1]	Y. Ma, F.Y. Han, C. Liu, M.Z. Li, Acta Metall. Sin. -Engl. Lett. 33, 233 (2020)
[2]	Y. Miyahara, Z. Horita, T.G. Langdon, Mater. Sci. Eng. A 420, 240 (2006) DOI URL
[3]	Z. Zeng, J.F. Nie, S.W. Xu, C.H.J. Davies, N. Birbilis, Nat. Commun. 972, 1 (2017)
[4]	W. Wang, P. Han, P. Peng, T. Zhang, Q. Liu, S.N. Yuan, L.Y. Huang, H.L. Yu, K. Qiao, K.S. Wang, Acta Metall. Sin. -Engl. Lett. 33, 43 (2020)
[5]	Z.Y. Ma, R.S. Mishra, M.W. Mahoney, R. Grimes, Metall. Mater. Trans. A Phys. Metall. Mater. Sci. 36, 1447 (2005) DOI URL
[6]	Z.Y. Ma, G.M. Xie, Z.A. Luo, P. Xue, G.D. Wang, Mater. Trans. 52, 2278 (2011) DOI URL
[7]	Y.S. Sato, S.H.C. Park, A. Matsunaga, A. Honda, H. Kokawa, J. Mater. Sci. 40, 637 (2005) DOI URL
[8]	X.C. Luo, D.T. Zhang, G.H. Cao, C. Qiu, D.L. Chen, Mater. Sci. Eng. A 759, 234 (2019) DOI URL
[9]	A. Raja, P. Biswas, V. Pancholi, Mater. Sci. Eng. A 725, 492 (2018) DOI URL
[10]	F. Chai, D. Zhang, W. Zhang, Y. Li, Mater. Sci. Eng. A 590, 80 (2014) DOI URL
[11]	X.C. Luo, D.T. Zhang, G.H. Cao, C. Qiu, D.L. Chen, J. Mater. Sci. 54, 8640 (2019) DOI
[12]	F. Chai, D.T. Zhang, Y.Y. Li, Materials 7, 1 (2014) DOI URL
[13]	X. Meng, Y. Huang, J. Cao, J. Shen, J.F. dos Santos, Prog. Mater. Sci. 115, 100706 (2021) DOI URL
[14]	F. Nascimento, T. Santos, P. Vilaca, R.M. Miranda, L. Quintino, Mater. Sci. Eng. A 506, 16 (2009) DOI URL
[15]	Y. Xie, X. Meng, Y. Li, D. Mao, L. Wan, Y. Huang, Compos. Commun. 26, 1 (2021)
[16]	Y.N. Wang, J.C. Huang, Mater. Trans. 44, 2276 (2003) DOI URL
[17]	X. Du, B. Wu Int. J. Mater. Res. 99, 203 (2008) DOI URL
[18]	S.X. Sheng, Y.L. Guo, S.F. Liu, S.L. Wu, Adv. Mater. Res. 941-944, 93 (2014)
[19]	H.Y. Wang, J. Rong, Z.Y. Yu, M. Zha, C. Wang, Z.Z. Yang, R.Y. Bu, Q.C. Jiang, Mater. Sci. Eng. A 697, 149 (2017) DOI URL
[20]	W.J. Kim, J.D. Park, J.Y. Wang, W.S. Yoon, Scr. Mater. 57, 755 (2007) DOI URL
[21]	Y.N. Wang, J.C. Huang, Metall. Mater. Trans. A 35, 555 (2004) DOI URL
[22]	Q. Yang, B.L. Xiao, Z.Y. Ma, R.S. Chen, Scr. Mater. 65, 335 (2011) DOI URL
[23]	X.C. Luo, L.M. Kang, H.L. Liu, Z.J. Li, Y.F. Liu, D.T. Zhang, D.L. Chen, Mater. Sci. Eng. A 797, 139945 (2020) DOI URL
[24]	U.T. Watanabe, Kurimoto K. Mater. Sci. Eng. A 558, 656 (2012)
[25]	Q. Yang, B.L. Xiao, Q. Zhang, M.Y. Zheng, Z.Y. Ma, Scr. Mater. 69, 801 (2013) DOI URL
[26]	B. Kim, J.C. Kim, S. Lee, K.S. Lee, J.G. Lee, S.S. Park, Scr. Mater. 141, 138 (2017) DOI URL

Processing	Grain size (μm)	Elongation (%)	Deformation conditions (K, s^-1)	Reference
Warm-extrusion	6.5	PD: 500	548, 1 × 10^-3	[16]
		45°: 600
		TD: 380
4-pass FSP (OR = 100%)	8	PD^a: 122	573, 3.3 × 10^-4	[17]
4-pass FSP (OR = 100%)	8	TD: 118	573, 3.3 × 10^-4	[17]
M-FSP (OR = 50%)	~ 7.8	PD: 106	623, 1 × 10^-3	[8]
		45°: 80
		TD: 55
4-pass FSP (OR = 100%) + compression	7.8	230-250	623, 1 × 10^-4	[18]
Conventional rolling	3.4	346	573, 1 × 10^-3	[19]
Extrusion + ECAP	0.6	1320	473, 3.3 × 10^-4	[2]
Differential speed rolling	0.3-0.5	850	523, 3 × 10^-4	[20]

Processing	Grain size (μm)	Elongation (%)	Deformation conditions (K, s^-1)	Reference
Warm-extrusion	6.5	PD: 500	548, 1 × 10^-3	[16]
		45°: 600
		TD: 380
4-pass FSP (OR = 100%)	8	PD^a: 122	573, 3.3 × 10^-4	[17]
4-pass FSP (OR = 100%)	8	TD: 118	573, 3.3 × 10^-4	[17]
M-FSP (OR = 50%)	~ 7.8	PD: 106	623, 1 × 10^-3	[8]
		45°: 80
		TD: 55
4-pass FSP (OR = 100%) + compression	7.8	230-250	623, 1 × 10^-4	[18]
Conventional rolling	3.4	346	573, 1 × 10^-3	[19]
Extrusion + ECAP	0.6	1320	473, 3.3 × 10^-4	[2]
Differential speed rolling	0.3-0.5	850	523, 3 × 10^-4	[20]

Tensile samples	Undeformed	Hot deformation in different directions
Tensile samples	Undeformed	PD	45°	TD
Average grain size (μm)	2.3 ± 1.8	3.1 ± 1.5	4.5 ± 3.5	4.1 ± 2.7
Fraction of HAGBs	0.85	0.92	0.89	0.92
Maximum intensity of basal texture (MRD)	26.3	13.1	17.8	10.0

Tensile samples	Undeformed	Hot deformation in different directions
Tensile samples	Undeformed	PD	45°	TD
Average grain size (μm)	2.3 ± 1.8	3.1 ± 1.5	4.5 ± 3.5	4.1 ± 2.7
Fraction of HAGBs	0.85	0.92	0.89	0.92
Maximum intensity of basal texture (MRD)	26.3	13.1	17.8	10.0