Intermetallic Phase Formation in TP-1 and DC Cast Billet of an AA6063 Al Alloy

Verma, A.; Kumar, S.; Grant, Patrick S.; O’Reilly, Keyna

doi:10.1007/978-3-319-48761-8_215

Cited by 1 publication

(1 citation statement)

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“…18 Major experimental studies have been carried out using a TP-1 mold that had been established to simulate DC casting solidification conditions and to estimate grain-refining efficiency. However, according to, 21 the shape and distribution of second phases are not consistent with DC casting, as these features also depend on other metallurgical factors, such as thermal gradients and macro-segregation of elements, etc. Therefore, it is expedient to conduct studies on large-scale DC-cast billets.…”

Section: Introductionmentioning

confidence: 98%

Comparative Analysis of Structure and Properties of Nb-B Inoculated Direct Chill Cast AA4032 Alloy Extruded from As-Cast and Homogenized Conditions

Barekar

Skalicky

Wang

et al. 2022

JOM

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Al-Si wrought piston alloys can lack properties due to inefficient grain refining. A novel Al-Nb-B grain refiner was introduced some time ago, but has still not been assessed in industry for wrought alloys. This paper describes the first trial of Al-Ni-B addition and its impact on the full-scale manufacturing, structure, and properties of the AA4032 products extruded with and without billet homogenization. It is shown that Nb-B inoculation gives opportunities not only to have a refined as-cast structure but also a more homogenous distribution of the solute. In contrast, homogenization drives nucleation and coarsening of the Mg2Si phase that is retained during further extrusion and heat treatment also affecting the precipitation and properties. It was observed that non-homogenized specimens perform better during machining and tensile testing compared to homogenized specimens. The results are supported by electron microscopy investigations of microstructure formation during different steps in downstream processing.

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Section: Introductionmentioning

confidence: 98%