Amol A. Gokhale

TL;DR: In this paper, closed cell aluminium foam has been examined with respect to crash protection systems, stiff and strong light weight structures and sound absorbing panels / enclosures for use in automotive systems.

Abstract: This chapter reviews the precipitation and precipitate phases that occur during heat treatments in multi-component Al-Li based alloys. It describes aspects related to nucleation, growth, morphology and orientation relationships of the strengthening precipitates δ’ and T1, the toughening precipitate S’ and the recrystallisation-inhibiting precipitate β’. Equilibrium precipitate phases such as T2, which are deleterious to the mechanical and corrosion properties of the alloys, are also described. It is shown that careful alloy chemistry control, two-step homogenization and controlled stretching prior to ageing can be employed to improve the volume fraction and distribution of the precipitate phases. All these processing aspects are necessary to achieve optimum combinations of properties for the alloys.

TL;DR: In this paper, discrete and compositionally graded dual materials based on SS316 and IN625 alloys were made using LENS™ process by layer wise deposition, controlling feed rates of individual alloy powders The two-alloy interface regions were characterized with respect to microstructure, elemental distribution, micro-hardness, and tensile properties of the deposits.

TL;DR: In this paper, closed cell aluminium foam fitted AISI 304L stainless steel tube was investigated for its impact energy absorption characteristics, and a free flight drop tower was used to obtain the acceleration-time history of the hammer.

TL;DR: In this paper, a detailed examination of the orientation relationship between spherical, coherent Al 3 Zr precipitates and the Al matrix was performed and it was shown that the cube-on-cube orientation relationship does not hold good for the faceted β-particles and that they are twin-related with the matrix.