𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On the growth of Widmanstätten precipitates in an Al–Cu alloy

✍ Scribed by Yan Li; Gary Purdy

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
288 KB
Volume
56
Category
Article
ISSN
1359-6454

No coin nor oath required. For personal study only.

✦ Synopsis

The formation of intragranular h 0 disk-shaped precipitates in Al-Cu alloys is accompanied by a thickness-dependent misfit strain. In this study, the lengthening rates of Widmansta ¨tten h 0 precipitates of two different thicknesses (1.2 and 2.0 nm) are compared. It is shown experimentally that the thinner precipitates grow more slowly than their 2.0 nm thick counterparts. These observations are interpreted in terms of a model that includes the effects of capillarity and of misfit strain, as well as the effect of a misfitting solute (Cu) in the diffusion field in the parent crystal.

📜 SIMILAR VOLUMES

Edgewise growth of Widmanstätten alpha p
Edgewise growth of Widmanstätten alpha precipitates in brass
✍ E.P. Simonen; R. Trivedi 📂 Article 📅 1977 🏛 Elsevier Science ⚖ 595 KB

The lengthening rates of needle and plate precipitates of alpha phase from beta brass are examined. Measured kinetics are compared with rates expected from volume diffusion considerations. Needle lengthening in ordered beta brass is found to be compatible with the volume diffusion model

Planar defects within θ precipitates in
Planar defects within θ precipitates in an Al-3.93 WT.% Cu alloy
✍ R. Sankaran; C. Laird 📂 Article 📅 1977 🏛 Elsevier Science ⚖ 997 KB

defects such as antiphase domain boundaries, twin boundaries. stacking faults and dislocation boundaries have been observed within the 0 precipitates in an N-3.93 wt. 0, Cu alloy. The structures of these boundaries have been analysed and precipitate coalescence has been taken to k the predominant me

The precipitation of θ' at high-angle bo
The precipitation of θ' at high-angle boundaries in an Al-Cu alloy
✍ D Vaughan 📂 Article 📅 1970 🏛 Elsevier Science ⚖ 678 KB

In the AI-Cu system precipitates of the intermediate 0' phase generally nualeate at low-angle boundaries and precipitates of the equilibrium 0 phase form at high-angle boundaries. A few exceptions oocur where 8' precipitates form at high-angle boundaries and these have been studied by transmission e