Daniel Irmer, Mohamed Sennour, Fan Sun, Philippe Vermaut, Charbel Moussa, Vladimir A. Esin
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引用次数: 0
Abstract
The transition from heterogeneous nucleation of nanoscale hardening S-phase precipitates on dislocation lines in cold-rolled aluminium alloy 2024 (Al–Cu–Mg) to a spatially homogeneous distribution during artificial ageing is studied by means of in situ and ex situ transmission electron microscopy (TEM). Three stages of precipitate evolution following nucleation on dislocation lines are established: (i) Growth and coalescence on dislocation lines, (ii) Ostwald ripening controlled by pipe diffusion, and (iii) Ostwald ripening controlled by volume diffusion. Whilst Ostwald ripening controlled by pipe diffusion is active (stage (ii) and transition from stage (ii) to stage (iii)) dislocation annihilation and/or re-arrangement can occur.
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MRS Communications is a full-color, high-impact journal focused on rapid publication of completed research with broad appeal to the materials community. MRS Communications offers a rapid but rigorous peer-review process and time to publication. Leveraging its access to the far-reaching technical expertise of MRS members and leading materials researchers from around the world, the journal boasts an experienced and highly respected board of principal editors and reviewers.
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