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Acta Metall Sin  2018, Vol. 54 Issue (10): 1451-1460    DOI: 10.11900/0412.1961.2018.00072
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Effect of Coarse β(Al3Mg2) Phase on Microstructure Evolution in 573 K Annealed Al-10Mg Alloy by Uniaxial Compression
Yizhe MAO, Jianguo LI(), Lei FENG
Key Laboratory of Advanced Materials, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China
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Abstract  

Al-Mg series alloy plays an important role in offshore manufacturing, transportation and aerospace industries for its high strength-to-weight ratio, high corrosion resistance and good welding performance. For high magnesium Al-Mg alloy, β phase always acts as a restraint condition to the whole thermal mechanical processing (TMP) procedure. Its positive effect is still unclear. In this work, the effect of coarse β(Al3Mg2) phase of Al-10Mg alloy annealed at 573 K for 24 h and applied double passes uniaxial compression on microstructure evolution was studied by using OM, XRD, EPMA and EBSD. The result shows that discrete coarse β phase was precipitated in the interior of grains after 573 K and 24 h annealing treatment. The true stress-true strain curve of annealed sample was lower than that of solution treated one. Hardening rate of annealed sample was lower in first compression pass, and conversely higher than that of solution treated one in the second pass. Solution Mg atoms play an important role in strain hardening during dynamic recovery. Dislocation slipping was obstructed by coarse β phase, and then low angle boundary (LAB) was stimulated near coarse β phase. Not just bulging nucleation mechanism working, dynamic recrystallization nucleation was stimulated and microstructure was refined. Since part of deformation-stored energy was lured away by LAB, lattice rotation of deformed grains were weakened possessing {001} and {101} textures simultaneously. Schmid factors of three blocks with different lattice orientations were calculated, which suggested that alloy can load more plastic deformation after annealing treatment. Texture of recrystallized new grains was weakened at the same time. Microstructure anisotropy could be controlled by coarse β phase in TMP.

Key words:  Al-10Mg alloy      annealing treatment      β(Al3Mg2) phase;      low angle boundary      grain refinement      microstructure evolution     
Received:  05 March 2018     
ZTFLH:  TG146.2  
Fund: Supported by International Science & Technology Cooperation Program of China (No.2015DFR50470)

Cite this article: 

Yizhe MAO, Jianguo LI, Lei FENG. Effect of Coarse β(Al3Mg2) Phase on Microstructure Evolution in 573 K Annealed Al-10Mg Alloy by Uniaxial Compression. Acta Metall Sin, 2018, 54(10): 1451-1460.

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https://www.ams.org.cn/EN/10.11900/0412.1961.2018.00072     OR     https://www.ams.org.cn/EN/Y2018/V54/I10/1451

Fig.1  OM images (a, b) and Mg EPMA mappings (c, d) of as-cast (a, c) and 573 K, 24 h annealed (b, d) Al-10Mg alloy, and XRD spectra of solution treated and annealed Al-10Mg alloy (e) (δ—angular deviation)
Fig.2  Mechanical properties of solution treated and annealed Al-10Mg alloy sample (μ—strain deviation)
(a) true stress-true strain curves
(b, c) hardening rate (θ) curves in first and second compression, respectively
Fig.3  Microstructures and statistical result of compressed Al-10Mg alloy (TD—transverse direction, RD—rolling direction)
(a) inverse pole figure (IPF) of solution treated compressed sample
(b) IPF of annealed compressed sample
(c) Kernel average misorientation (KAM) of solution treated compressed sample
(d) KAM of annealed compressed sample
(e) new grain size distribution
(f) number distribution of low angle boundary (LAB)
Fig.4  Magnified microstructure containing β phase and LAB in Fig.3 without cleanup (Numbers in Figs.4a~d are the serial number of blocks)
(a) a red deformed grain with three long LABs
(b) a green deformed grain with six long LABs
(c) a yellow deformed grain with two pixel cluster
(d) a β phase surrounded by four new grains
(e) orientation of cluster 1# in Fig.4a
(f) orientation of cluster 7# in Fig.4b
(g) orientation of cluster 13# in Fig.4c
Fig.5  IPF of solution treated (a~c) and annealed (d~f) compressed Al-10Mg alloy samples
(a, d) IPF of solution treated and annealed compressed samples, respectively
(b, e) IPF of deformed grains in samples
(c, f) IPF of new grains in samples
Fig.6  Schmid factor distribution of cluster 1#, 7# and 13#
No. Slip system 1# 7# 13#
1 (111)[01] 0.0445 0.0726 0.2449
2 (111)[10] 0.2449 0.0280 0.0816
3 (111)[10] 0.2895 0.0445 0.1633
4 (11)[110] 0.3637 0.0759 0.0816
5 (11)[101] 0.4676 0.0693 0.0816
6 (11)[01] 0.1039 0.1452 0.2449
7 (11)[011] 0.1781 0.1138 0.2449
8 (11)[10] 0.4899 0.3225 0.2449
9 (11)[110] 0.3118 0.4363 0.4899
10 (11)[011] 0.1188 0.1039 0.2449
11 (11)[10] 0.3860 0.4676 0.4899
12 (11)[101] 0.2672 0.3637 0.2449
Table 1  Schmid factors of clusters 1#, 7# and 13# in Fig.4
[1] Wang Y G.Study of formability properties of 5182 aluminum alloy automobile plate [D]. Chongqing: Chongqing University, 2016(王游根. 5182铝合金汽车板成形性能的研究 [D]. 重庆: 重庆大学, 2016)
[2] Bingay C P.Microstructural response of aluminum-magnesium alloys to thermomechanical processing [D]. Monterey: Naval Postgraduate School, 1977
[3] Kuhnert G J Jr. The influence of warm rolling parameters (temperature and reheating time between passes) on the superplastic response of Al-Mg alloys [D]. Monterey: Naval Postgraduate School, 1988
[4] Buckley J F.The deformation characteristics and microstructural dynamics of an Al-10Mg-0.1Zr alloy [D]. Monterey: Naval Postgraduate School, 1992
[5] Liu J, Kolak M. A new paradigm in the design of Aluminum alloys for aerospace applications [J]. Mater. Sci. Forum, 2000, 331-337: 127
[6] Yi G S, Littrell K C, Poplawsky J D, et al.Characterization of the effects of different tempers and aging temperatures on the precipitation behavior of Al-Mg (5.25 at.%)-Mn alloys[J]. Mater. Des., 2017, 118: 22
[7] Fakhraei O, Emamy M.Effects of Zr and B on the structure and tensile properties of Al-20%Mg[J]. Mater. Des., 2014, 56: 557
[8] Liu Z X, Li Z J, Wang M X, et al. Effect of complex alloying of Sc, Zr and Ti on the microstructure and mechanical properties of Al-5Mg alloys [J]. Mater. Sci. Eng., 2008, A483-484: 120
[9] Chibane N, Ait-Amokhtar H, Fressengeas C.On the strain rate dependence of the critical strain for plastic instabilities in Al-Mg alloys[J]. Scr. Mater., 2017, 130: 252
[10] Bernard C, Co?r J, Laurent H, et al.Influence of portevin-le chatelier effect on shear strain path reversal in an Al-Mg alloy at room and high temperatures[J]. Exp. Mech., 2017, 57: 405
[11] Yi G S, Zeng W Z, Poplawsky J D, et al.Characterizing and modeling the precipitation of Mg-rich phases in Al 5xxx alloys aged at low temperatures[J]. J. Mater. Sci. Technol., 2017, 33: 991
[12] D'Antuono D S, Gaies J, Golumbfskie W, et al. Direct measurement of the effect of cold rolling on β phase precipitation kinetics in 5xxx series aluminum alloys[J]. Acta Mater., 2017, 123: 264
[13] Zhu Y K, Cullen D A, Kar S, et al.Evaluation of Al3Mg2 precipitates and Mn-rich phase in aluminum-magnesium alloy based on scanning transmission electron microscopy imaging[J]. Metall. Mater. Trans., 2012, 43A: 4933
[14] EDAX. OIM Analysis 7.3 Manual, 2013
[15] Zhang L G.Research on static recrystallization behavior and simulation of microstructure evolution for 316LN [D]. Qinhuangdao: Yanshan University, 2014(张丽舸. 316LN静态再结晶行为及其组织演变模拟研究 [D]. 秦皇岛: 燕山大学, 2014)
[16] He Y.Simulation of dynamic recrystallization process of metallic materials by cellular automata method [D]. Dalian: Dalian University of Technology, 2005(何燕. 金属材料动态再结晶过程的元胞自动机法数值模拟 [D]. 大连: 大连理工大学, 2005)
[17] Kocks U F, Mecking H.Physics and phenomenology of strain hardening: the FCC case[J]. Prog. Mater. Sci., 2003, 48: 171
[18] Yan L M.Study on the working-hardening of magnesium alloy [D]. Wuhan: Wuhan University of Science and Technology, 2012(闫立明. 镁合金加工硬化的研究 [D]. 武汉: 武汉科技大学, 2012)
[19] Mao W M.Crystallographic Textures and Anisotropies of Metal Materials [M]. Beijing: Science Press, 2002: 39(毛卫民. 金属材料的晶体学织构与各向异性 [M]. 北京: 科学出版社, 2002: 39)
[20] Engler O, Randle V.Introduction to Texture Analysis: Macrotexture, Microtexture, and Orientation Mapping [M]. 2nd Ed., Boca Raton, FL: CRC Press, 2010: 75
[21] Wang F.In situ EBSD studies of the plastic deformation within grain/subgrain of aluminum alloys [D]. Beijing: Beijing University of Technology, 2012(王峰. 铝合金单个晶粒/亚晶粒内塑性变形机制的原位EBSD研究 [D]. 北京: 北京工业大学, 2012)
[22] Rofman O V, Bate P S, Brough I, et al.Study of dynamic grain growth by electron microscopy and EBSD[J]. J. Microsc., 2009, 233: 432
[23] Xu W, Ferry M, Cairney J M, et al.Three-dimensional investigation of particle-stimulated nucleation in a nickel alloy[J]. Acta Mater., 2007, 55: 5157
[24] Humphreys F J, Bate P S.Measuring the alignment of low-angle boundaries formed during deformation[J]. Acta Mater., 2006, 54: 817
[25] Ferry M, Humphreys F J.The deformation and recrystallization of particle-containing {011}<100> aluminium crystals[J]. Acta Mater., 1996, 44: 3089
[26] Humphreys F J, Ardakani M G.The deformation of particle-containing aluminium single crystals[J]. Acta Metall. Mater., 1994, 42: 749
[27] Miura H, Aoyama H, Sakai T.Effect of grain-boundary misorientation on dynamic recrystallization of Cu-Si bicrystals[J]. J. Jpn. Inst. Met., 1994, 58: 267
[28] Sakai T, Belyakov A, Kaibyshev R, et al.Dynamic and post-dynamic recrystallization under hot, cold and severe plastic deformation conditions[J]. Prog. Mater. Sci, 2014, 60: 130
[29] Ma P C.Effect of microstructure and texture on the formability and serrated deformation behavior of 5xxx series aluminum alloy [D]. Beijing: University of Science and Technology Beijing, 2015(马鹏程. 5xxx铝合金板材的组织和织构对其成形性和锯齿屈服行为的影响 [D]. 北京: 北京科技大学, 2015)
[30] Yao Z Y.Quantitative investigation of microstructural and texture evolution during cold rolling AA3104 and AA1050 aluminum alloys [D]. Beijing: Tsinghua University, 2009(姚宗勇. 冷轧3104和1050铝合金微观组织及织构变化的定量研究 [D]. 北京: 清华大学, 2009)
[31] Wei Y L.Research of the dislocation structures of deformed FCC metals [D]. Beijing: Tsinghua University, 2011(魏绎郦. 面心立方金属中形变位错结构的研究 [D]. 北京: 清华大学, 2011)
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