Improvement of Impact Strength and Fracture Toughness of Castings through Chemically Induced Residual Stress (ACRC Funded)

Courtesy: M P Nascimento, R C Souza, W L Pigatin, H J C Voorwald, "Effects of surface treatment on the fatigue strength of AISI 4340 aeronautical steel", International Journal of Fatigue 23(7): pp.607-618, [2001].

Aluminum alloys find applications in many areas of materials manufacturing, including aerospace and automotive industry, as well as household appliances. Alloys are developed to meet various multi-functional demands that include high fatigue resistance and impact toughness while meeting the castability and formability needs. These niche alloys however often come at a much higher cost. Common alloys such as A356 are relatively cheap and easy to work with but have considerably lower fracture toughness and are much more expensive than an alloy such as A201.