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Type van Dalen, Marsha E.; Dunand, David C.; Seidman, David N.
  Publication Precipitation Strengthening in Al (Sc,Ti) Alloys Volume Book Chapter
Pages 2003
  Abstract Affordable Metal-Matrix Composites for High Performance Applications II  
  Corporate Author  
  Summary Language 195-201 Series Editor Al-Sc-Ti alloys; Precipitation hardening; Microstructure; Three-dimensional atom-probe microscopy  
Abbreviated Series Title Three-dimensional atom probe (3DAP) and field-ion microscopies, together with microhardness measurements, are employed to analyze Al3(Sc1-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 Al3(Sc1-xTix) precipitates remain stable and coarsening-resistant up to aging times of at least 240 hr. at 300°C.
  Series Issue Northwestern University; Northwestern University ISSN  
  Expedition TMS Notes Chicago  
Call Number  
Contribution Id English  
Serial URL ISBN  
0-87339-557-3 Materials Science & Technology 2003 no NU @ karnesky @ 570
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