What is it about?

Alloy systems with shearable precipitates deform inhomogeneously by planar slip which lead to brass type texture components in rolled sheets. Here we have shown that the T1 precipitates in Al-Cu-Li alloy, though a shearable precipitate, leads to homogeneous deformation and Cu and S components in the rolled sheet.

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Why is it important?

Our investigation shows that shearing of T1 precipitates does not lead to planar slip in contrast to what is generally observed in other 2000, 6000 and 7000 series alumiinum alloys. We show that slip occurs on multiple slip systems in the presence of T1 precipitates which result in significant strain hardening and the Cu and S components in deformation texture.

Perspectives

The observation of Cu type texture components in an peak aged aluminium alloy was perplexing to us initially. Our team has worked on many other 2000 and 6000 series alloys and never came across these pure material texture components in peak aged temper. This work motivated us to explore rate sensitive and other aspects of the deformation behaviour of this alloy.

Dr. Manasij Kumar Yadava
Indian Institute of Technology Kanpur

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This page is a summary of: Deformation behaviour of Al–Cu–Li alloy containing T1 precipitates, Materials Science and Technology, August 2018, Taylor & Francis,
DOI: 10.1080/02670836.2018.1510074.
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