J Mater Sci Technol ›› 1996, Vol. 12 ›› Issue (3): 199-202.

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Fracture Toughness of Cast Al-Zn-Mg Alloys

K.H. W.Seah(Dept. of Mech. Eng., National University of Singapore, Singapore 0511)S. C. Sharma (To whom correspondence should be addressed)(Dept. of Mech. Eng., R.V.College of Engineering, Bangalore-560-059, Karnataka, India)   

  • Received:1996-05-28 Revised:1996-05-28 Online:1996-05-28 Published:2009-10-10

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Abstract: Compact tension specimens of as-cast Al-3Zn-2Mg and Al-7Zn-2Mg (in wt pct) alloys were subjected to fracture toughness tests at room temperature according to specification5 laid down in ASTM E-399-81. It was found that increasing the Zn content, grain refinement and increasing the solidification rate lead to an increase in the fracture toughness of the material.

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