研究不同加钛方式和钛含量对铸造A356铝合金常温低周疲劳行为的影响,分析合金疲劳断口的形貌特征.结果表明:4种A356合金均表现出明显的循环硬化行为,但Ti含量(质量分数)为0.14%的合金比Ti含量为0.10%的合金具有更高的循环硬化率.在低应变时,加钛方式对合金的循环硬化影响相近;而在高应变时,电解加钛A356合金表现为类似"饱和"的准稳定形变行为,熔配加钛合金则表现为持续的循环硬化特征.加钛方式对A356合金低周疲劳寿命的影响不明显,其疲劳寿命仅受合金中Ti含量的影响;Ti含量为0.10%的A356合金较Ti含量为0.14%的合金具有更优异的低周疲劳寿命,这主要是由于前者具有较低的屈服强度.
参考文献
| [1] | A.R. Emami;S. Begum;D.L. Chen;T. Skszek;X.P. Niu;Y. Zhang;F. Gabbianelli .Cyclic deformation behavior of a cast aluminum alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2009(1/2):31-41. |
| [2] | 宋谋胜,刘忠侠,李继文,宋天福,王明星,谢敬佩,翁永刚.加钛方式与钛含量对A356合金组织和性能的影响[J].中国有色金属学报,2004(10):1729-1735. |
| [3] | M. Avalle;G. Belingardi;M.P. Cavatorta .Casting defects and fatigue strength of a die cast aluminium alloy: a comparison between standard specimens and production components[J].International Journal of Fatigue,2002(1):1-9. |
| [4] | Mo De-Feng;He Guo-Qiu;Hu Zheng-Fei;Zhu Zheng-Yu;Chen Cheng-Shu;Zhang Wei-Hua .Crack initiation and propagation of cast A356 aluminum alloy under multi-axial cyclic loadings[J].International Journal of Fatigue,2008(10/11):1843-1850. |
| [5] | HANS W;SHINJI K S .Fatigue crack growth behavior in semi-liquid die-cast Al-7%Si-0.4%Mg alloys with fine effective grain structure[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2001,308:225-232. |
| [6] | Zhang B.;Chen W. .Effect of solidification cooling rate on the fatigue life of A356.2-T6 cast aluminium alloy[J].Fatigue & Fracture of Engineering Materials and Structures,2000(5):417-423. |
| [7] | K. Gall;N. Yang;M. Horstemeyer;D. L. McDowell;J. Fan .The influence of modified intermetallics and Si particles on fatigue crack paths in a cast A356 Al alloy[J].Fatigue & Fracture of Engineering Materials and Structures,2000(2):159-172. |
| [8] | Han SW.;Katsumata K.;Kumai S.;Sato A. .Effects of solidification structure and aging condition on cyclic stress-strain response in Al-7% Si-0.4% Mg cast alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):170-178. |
| [9] | S. Ganesh Sundara Raman;v.M. Radhakrishnan .On cyclic stress-strain behaviour and low cycle fatigue life[J].Materials & Design,2002(3):249-254. |
| [10] | LIU Z X;WANG M X;SONG T F .The production and the mechanical properties of in-situ titanium alloying A356 alloys[J].Materials Science Forum,2005,475/479:321-324. |
| [11] | LANDGRAF R W .Achievement of high fatigue resistance in metals and alloys[J].ASTM Stp,1970,3:467-470. |
| [12] | WANG Q G;CACERES C H .On the strain hardening behaviour of Al-Si-Mg casting alloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1997,234/236:106-109. |
| [13] | P.S. De;R.S. Mishra;C.B. Smith .Effect of microstructure on fatigue life and fracture morphology in an aluminum alloy[J].Scripta materialia,2009(7):500-503. |
| [14] | S. Jana;R.S. Mishra;J.B. Baumann .Effect of friction stir processing on fatigue behavior of an investment cast Al-7Si-0.6 Mg alloy[J].Acta materialia,2010(3):989-1003. |
| [15] | Chan KS.;Jones P.;Wang QG. .Fatigue crack growth and fracture paths in sand cast B319 and A356 aluminum alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):18-34. |
| [16] | Xue Y;El Kadiri H;Horstmeyer MF;Jordon JB;Weiland H .Micromechanisms of multistage fatigue crack growth in a high-strength aluminum alloy[J].Acta materialia,2007(6):1975-1984. |
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