通过金相观察、拉伸性能测试、X射线衍射、扫描电镜及能谱分析,研究了Mn、Cr对Al-Mg-Si-Cu铝合金微观组织及拉伸性能的影响。结果表明：添加Mn和Cr均能促进Al-Mg-Si-Cu合金铸锭形成粗大结晶相化合物,并且添加Mn的合金中形成的结晶相更多;均匀化过程中Mn和Cr均能促进结晶相由Al5FeSi型向Al8Fe2Si型转变,并且同时添加Mn和Cr的促进作用更加显著;添加Mn、Cr均能抑制变形晶粒在固溶处理时发生再结晶和晶粒长大,并且由单独添加Cr、单独添加Mn到同时添加Mn和Cr,抑制作用逐渐增强;添加Cr对合金强化作用有限,而添加Mn能显著提高合金强度。
Effects of Mn and Cr on microstructure and tensile properties of Al-Mg-Si-Cu aluminium alloys were studied by means of metallographic analysis,tensile test,X-ray diffraction（XRD）,scanning electron microscopy（SEM）and energy dispersive spectrum（EDS） analysis.The results indicate that the formation of coarse compound phases in the casts is accelerated with the addition of Mn and Cr,and the effect of Mn is more significant in both Mn-containing and Mn-and Cr-containing alloys.The phase transformation of Al5FeSi to Al8Fe2Si during homogenization is accelerated by the addition of Mn or Cr,and the combination addition of Mn and Cr is the most effective.The recrystallization and grain growth of the alloys are inhibited during solution treatment by the addition of Cr and Mn.The inhibition effect from Cr-containing,Mn-containing to Mn-and Cr-containing alloys is gradually increased.The strength of the alloys increases slightly by adding Cr,however,the addition of Mn can significantly improve the strength of the alloy.
参考文献
| [1] | Immarigen J P;Holt R T;Koul A K et al.Light weight materials for aircraft applications[J].Materials Characterization,1995,35(01):41-67. |
| [2] | Starke E A;Staley Jr J T .Application of modern aluminum alloys to aircraft[J].Progress in Aerospace Sciences,1996,32(2-3):131-172. |
| [3] | Dif R;Bes B;Warner T.Recent development in AA6056 aluminum alloy used for aerospace[A].,2001:390-397. |
| [4] | M.R.W.S. Abdala;J.C. Garcia de Blas;C. Barbosa .Thermoelectrical power analysis of precipitation in 6013 aluminum alloy[J].Materials Characterization,2008(3):271-277. |
| [5] | Delmas F;Casanove M J;Lours P et al.Quantitative TEN study of the precipitation microstrueture in aluminium alloy Al(MgSiCu)6056 T6[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2004,373(1-2):80-89. |
| [6] | Jeniski Jr R A .Effects of Cr addition on the microstructure and mechanical behavior of 6061-T6 continuously cast and rolled redraw rod[J].Materials Science and Engingeering A,1997,237(01):52-64. |
| [7] | Soo Woo Nam;Duck Hee Lee .The effect of Mn on the mechanical behavior of Al alloys[J].Metals and Materials International,2000,6(01):13-16. |
| [8] | JI Yan-li,GUO Fu-an,PAN Yan-feng.Microstructural characteristics and paint-bake response of Al-Mg-Si-Cu alloy[J].中国有色金属学会会刊（英文版）,2008(01):126-131. |
| [9] | Y.L. Liu;S.B. Kang;H.W. Kim .The complex microstructures in an as-cast Al-Mg-Si alloy[J].Materials Letters,1999(6):267-272. |
| [10] | N.C.W. Kuijpers;F.J. Vermolen;C. Vuik;P.T.G. Koenis;K.E. Nilsen;S. van der Zwaag .The dependence of the β-AlFeSi to α-Al(FeMn)Si transformation kinetics in Al-Mg-Si alloys on the alloying elements[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):9-19. |
| [11] | L.lodgaard;N.Ryum .Distribution of Mn- and Cr-containing dispersoids in Al-Mg-Si-alloys[J].Materials Science Forum,2000(0):945-950. |
| [12] | Claves S R;Elias D L;Misiolek W Z .Analysis of intermetallic phase transformation occurring during homogenization of 6xxx aluminum alloys[J].Materials Science Forum,2002,396-402:667-674. |
| [13] | Zajac S;Hutchinson B;Johansson A et al.Microstructure control and extrudability of Al-Mg-Si alloys microalloyed with manganese[J].Journal De Physique,1993,3(07):251-254. |
| [14] | Lars Lodgaard;Nils Ryum .Precipitation of dispersoids containing Mn and/or Cr in Al-Mg-Si alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1/2):144-152. |
| [15] | 潘青林,李绍禄,邹景霞,尹志民.微量Mn对A1-Mg-Si合金微观组织与拉伸性能的影响[J].中国有色金属学报,2002(05):972-976. |
| [16] | Rong Hi,Tomo Ogura,Hiroyasu Tezuka,Tatsuo Sato,Qing Liu.Dispersoid Formation and Recrystallization Behavior in an Al-Mg-Si-Mn Alloy[J].材料科学技术学报（英文版）,2010(03):237-243. |
| [17] | D. H. Lee;J. H. Park;S. W. Nam .Enhancement of mechanical properties of Al-Mg-Si alloys by means of manganese dispersoids[J].Materials Science and Technology: MST: A publication of the Institute of Metals,1999(4):450-455. |
| [18] | LIVAK R J .The effects of copper and chromium on the aging response of dilute Al-Mg-Si alloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1982,13(07):1318-1321. |
| [19] | 徐磊,王永欣,赵志龙,陈铮.铝锂合金的层内与层间强化韧化的耦合机制[J].稀有金属,1998(06):406-409. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%