Equal channel angular pressing of a newly developed precipitation hardenable scandium containing aluminum alloy

Jahanzaib Malik, Wahaz Nasim, Bilal Mansoor*, Ibrahim Karaman, Dinc Erdeniz, David C. Dunand, David N. Seidman

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Precipitation hardenable aluminum alloys are well-known for their high strength-to-weight ratio, good thermal stability, electrical conductivity, and low cost. Equal channel angular pressing (ECAP) is proven to further improve the mechanical properties of metallic alloys through microstructure modification. In this work, ECAP of a recently developed, precipitation hardenable, cast Al–Er–Sc–Zr–V–Si alloy in peak-aged condition by route 4Bc was carried out to create an alloy with ultra-fine grain structure. The combined effect of grain refinement and precipitation on the tensile behavior and thermal stability of the ECAPed alloy is reported here. Improvement in yield strength and lack of strain hardening in ECAPed alloy were as expected. Microhardness contour plots with a narrower spread indicated enhancement in microstructural homogeneity after four ECAP passes as compared to the peak-aged condition. The variations in microhardness after annealing heat treatments at different temperatures highlighted the important role precipitates play in maintaining microstructure stability up to 250 °C in the ECAPed material.

Original languageEnglish (US)
Title of host publicationLight Metals 2018
EditorsOlivier Martin
PublisherSpringer International Publishing
Pages423-429
Number of pages7
ISBN (Print)9783319722832
DOIs
StatePublished - Jan 1 2018
EventInternational symposium on Light Metals, 2018 - Phoenix, United States
Duration: Mar 11 2018Mar 15 2018

Publication series

NameMinerals, Metals and Materials Series
VolumePart F4
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Other

OtherInternational symposium on Light Metals, 2018
CountryUnited States
CityPhoenix
Period3/11/183/15/18

Keywords

  • Aluminum alloy
  • ECAP
  • Microstructure
  • Precipitation strengthening

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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