@inproceedings{e09bd07650cd4ff2bc4e5e5fbcd9fdcc,
title = "Precipitation Strengthening in Al (Sc,Ti) Alloys",
abstract = "Three-dimensional atom probe (3DAP) and field-ion microscopies, together with microhardness measurements, are employed to analyze Al3(Sc 1-xTix) precipitates in an Al-0.06at%Sc-0.06at.%Ti alloy aged at 300°C for different times. The field-ion microscope images show a relatively high number density of precipitates (estimated at (3±2)×1021ppt m-3) at the aging times analyzed. Concentration profiles obtained with 3DAP microscopy show that both Sc and Ti partition to these precipitates. While most of the Sc is contained in the precipitates, the Ti resides mainly in the matrix in solid solution. Consequently, the addition of Ti increases the hardness of this alloy only modestly over that of binary Al-Sc alloys. Additionally, the coherent Al 3(Sc1-xTix) precipitates remain stable and coarsening-resistant up to aging times of at least 240 hr. at 300°C.",
keywords = "Al-Sc-Ti alloys, Microstructure, Precipitation hardening, Three-dimensional atom-probe microscopy",
author = "{Van Dalen}, {Marsha E.} and Dunand, {David C.} and Seidman, {David N.}",
year = "2003",
language = "English (US)",
isbn = "0873395573",
series = "Materials Science and Technology 2003 Meeting",
pages = "195--201",
editor = "A.B. Pandey and K.L. Kendig and J.J. Lewandowski and S.S. Shah",
booktitle = "Affordable Metal Matrix Composites for High Performance Applications II",
note = "Materials Science and Technology 2003 Meeting ; Conference date: 09-11-2003 Through 12-11-2003",
}