Top

Journal of Materials Engineering and Performance

Published in:

08-10-2018

Effects of Mg Content on the Fatigue Strength and Fracture Behavior of Al-Si-Mg Casting Alloys

Authors: Ming-Ze Wu, Ji-Wang Zhang, Yan-Bin Zhang, Hua-Qiang Wang

Published in: Journal of Materials Engineering and Performance | Issue 11/2018

Activate our intelligent search to find suitable subject content or patents.

search-config

AI-assisted search

Off

Abstract

In order to investigate the influence of Mg content on the fatigue properties in Al-Si-Mg alloy, uniaxial tensile tests and rotating bending fatigue tests were conducted on two Al-7Si-Mg casting alloys, with different Mg contents of 0.3 and 0.6 wt.%. The fracture surfaces of the specimens were observed by scanning electron microscopy, and the fatigue crack growth process was obtained by the replica method. The results indicate that the increase in Mg content enhances the yield strength and tensile strength of the alloy, whereas it reduces its elongation. There is an obvious knee point in the S–N curves of Al-7Si-0.6Mg alloy while that of Al-7Si-0.3Mg alloy shows continuous decrease. The fatigue strength at 5 × 10⁵ cycles is 60 MPa for Al-7Si-0.3Mg alloy and 80 MPa for Al-7Si-0.6Mg alloy. For the two types of specimens, the fatigue failure can initiate from crystal slip and casting defects. The replica results suggest that cracks in Al-7Si-0.6Mg alloy grow more slowly than that in Al-7Si-0.3Mg alloy.

previous article Hybrid CFRP/SWCNT Composites with Enhanced Electrical Conductivity and Mechanical Properties

next article Study on Texture Evolution and Shear Behavior of an Al/Ni/Cu Composite

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

über 102.000 Bücher
über 537 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Nachhaltigkeit
Finance + Banking
Management + Führung
Marketing + Vertrieb
Maschinenbau + Werkstoffe
Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

inform now

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

über 67.000 Bücher
über 390 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Nachhaltigkeit
Maschinenbau + Werkstoffe

Jetzt Wissensvorsprung sichern!

inform now

Y.H. Fan, S.H. Liu, and Y. Wang, Application of EN AC-AlSi7Mg0.6 Aluminum Alloy for Railway Contact Network, Hot Working Technol., 2015, 7, p 108–109

G.F. Qi, Reflections on Improving the Reliability of Catenary in Passenger Dedicated Line, Chin. Railw., 2005, 9, p 29–31+10

W.S. Huo, in Analysis of the Destruction and Influence of Alternating Stress on Catenary Equipment and Components, Excellent Essay Collection of Henan Railway Society in 2007 Academic Month, vol 7 (2007)

Y.Q. Liu, W.Q. Jie, S.N. Wang, and H.J. Luo, Investigation of Rotary Bending Gigacycle Fatigue Properties of Al-7Si-0.3Mg Alloys, Chin. J. Mater. Res., 2012, 26(3), p 284–288

G. Atxaga, A. Pelayo, and A.M. Irisarri, Effect of Microstructure on Fatigue Behaviour of Cast Al-7Si-Mg Alloy, Mater. Sci. Technol., 2013, 17(4), p 446–450CrossRef

X.S. Jiang, G.Q. He, and B. Liu, Microstructure-Based Analysis of Fatigue Behaviour of Al-Si-Mg Alloy, Trans. Nonferrous Met. Soc. China, 2011, 21(3), p 443–448CrossRef

X.S. Jiang, G.Q. He, and B. Liu, Fatigue Behaviour and Microstructure Evolution of Al-Mg-Si Alloy Under Constant and Variable Amplitude Loadings, Rare Met. Mater. Eng., 2010, 39(3), p 459–463

X.S. Jiang, G.Q. He, and B. Liu, Fatigue Characteristics and Microcosmic Mechanism of Al-Si-Mg Alloys Under Multiaxial Proportional Loadings, Int. J. Miner. Metall. Mater., 2011, 18(4), p 437CrossRef

J.Z. Yi, Y.X. Gao, and P.D. Lee, Microstructure-Based Fatigue Life Prediction for Cast A356-T6 Aluminum-Silicon Alloys, Metall. Mater. Trans. B, 2006, 37(2), p 301–311CrossRef

10.

H. Jiang, P. Bowen, and J.F. Knott, Fatigue Performance of a Cast Aluminum Alloy Al-7Si-Mg with Surface Defects, J. Mater. Sci., 1999, 34(4), p 719–725CrossRef

11.

D.A. Lados and D. Apelian, Fatigue Crack Growth Characteristics in Cast Al-Si-Mg Alloys: Part I. Effect of Processing Conditions and Microstructure, Mater. Sci. Eng. A, 2004, 385(1), p 200–211

12.

D.A. Lados and D. Apelian, Fatigue Crack Growth Characteristics in Cast Al-Si-Mg Alloys: Part II. Life Predictions Using Fatigue Crack Growth Data, Mater. Sci. Eng. A, 2004, 385(1), p 187–199

13.

H. Özdeş and M. Tiryakioğlu, On Estimating High-Cycle Fatigue Life of Cast Al-Si-Mg-(Cu) Alloys from Tensile Test Results, Mater. Sci. Eng. A, 2017, 688, p 9–15CrossRef

14.

A. Mandal, N. Chippa, and K. Jayasankar, Effect of High Magnesium Content on Microstructure of Al-7Si Alloy, Mater. Lett., 2014, 117(7), p 168–170CrossRef

15.

E.A. Elsharkawi, E. Samuel, and A.M. Samuel, Effects of Mg, Fe, Be Additions and Solution Heat Treatment on the π-AlMgFeSi Iron Intermetallic Phase in Al-7Si-Mg Alloys, J. Mater. Sci., 2010, 45(6), p 1528–1539CrossRef

16.

C.H. Caceres, C.J. Davidson, and J.R. Griffiths, The Effect of Mg on the Microstructure and Mechanical Behaviour of Al-Si-Mg Casting Alloys, Metall. Mater. Trans. A, 1999, 30(10), p 2611–2618CrossRef

17.

A. Thirugnanam, K. Sukumaran, and U.T.S. Pillai, Effect of Mg on the Fracture Characteristics of Cast Al-7Si-Mg Alloys, Mater. Sci. Eng. A, 2007, 445–446, p 405–414CrossRef

18.

Z.W. Chen and W.Q. Jie, Effects of Mg on the Microstructure and Mechanical Property of Al-Si-Mg Casting Alloys, J. Mater. Sci. Eng., 2004, 22(5), p 647–652

19.

D.H. Chen, W.S. Huang, and J.J. Tang, Effect of Cu and Mg on Mechanical Properties of Al-Si-Cu-Mg Alloy, Spec. Cast. Nonferrous Alloys, 2011, 31(4), p 367–368

20.

H. Möller, G. Govender, and W. Stumpf, Factors Influencing Tensile Mechanical Properties of Al-7Si-Mg Casting Alloys A356/7, Light Met., 2012, 510(1), p 467–471

21.

S.A. Kori, M.S. Prabhudev, and T.M. Chandrashekharaiah, Studies on the Microstructure and Mechanical Properties of A356 Alloy with Minor Additions of Copper and Magnesium, Trans. Indian Inst. Met., 2009, 62(4–5), p 353–356CrossRef

22.

R. Chen, Q.Y. Xu, and H.T. Guo, Correlation of Solidification Microstructure Refining Scale, Mg Composition and Heat Treatment Conditions with Mechanical Properties in Al-7Si-Mg Cast Aluminum Alloys, Mater. Sci. Eng. A, 2016, 685, p 391–402CrossRef

23.

G. Ran, J.E. Zhou, and Y.F. Wang, Tensile Properties and Fracture Analysis of Casting A356 Aluminum Alloy, Rare Met. Mater. Eng., 2006, 35(10), p 1620–1624

24.

J.A. Francis and G.M.D. Cantin, The Role of Defects in the Fracture of an Al-Si-Mg Cast Alloy, Mater. Sci. Eng. A, 2005, 407(1–2), p 322–329CrossRef

25.

Y. Murakami, Metal Fatigue: Effects of Small Defects and Nonmetallic Inclusions, Yokendo Ltd, Tokyo, 1993

26.

F.B.A. Samsol, The Role of Magnesium-Induced Work Hardening on the Fatigue Crack Growth Rate Scatter in new Al6061-T6 Aluminum Alloy, in Ph.D. Thesis, Kyushu University, Japan, 2017.

Title: Effects of Mg Content on the Fatigue Strength and Fracture Behavior of Al-Si-Mg Casting Alloys
Authors: Ming-Ze Wu
Ji-Wang Zhang
Yan-Bin Zhang
Hua-Qiang Wang
Publication date: 08-10-2018
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 11/2018
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-018-3688-9

Springer Professional

Abstract

Please log in to get access to your license.

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Springer Professional "Technik"

Other articles of this Issue 11/2018

Formation of Lamellar Carbides in Alloy 617-HAZ and Their Role in the Impact Toughness of Alloy 617/9%Cr Dissimilar Welded Joint

Achieving Excellent Strength–Ductility and Impact Toughness Combination by Cyclic Quenching in Medium Mn TRIP-Aided Steel

Parametric Modeling of AZ31-Mg Alloy Friction Stir Weld Temperature Histories

The Effects of Low Frequency on the Microstructure and Mechanical Properties of High-Strength Al-Mg Aluminum Alloys by Wire and Double-Pulsed Arc Additive Manufacturing

The Influence of Pr and Nd Substitution on Hydrogen Storage Properties of Mechanically Alloyed (La,Mg)2Ni7-Type Alloys

Mechanical Properties and Strain-Induced Martensite Transformation in Cold Rolling of 304L Stainless Steel Plate

Premium Partners