On the effect of plastic deformation on the coarsening of {theta}-phase precipitation in an Al-Cu alloy

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-997-0128-0· OSTI ID:474111

Cerri, E; Evangelista, E ^[1]; Ryum, N ^[2]

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1. Ancona Univ. (Italy). Dept. of Mechanics
2. Norwegian Inst. of Tech., Trondheim (Norway)

In the present investigation, the focus is on dynamic coarsening of the equilibrium {theta} phase in an Al-4 wt pct Cu alloy. For this purpose, specimens containing a uniform {theta} particle distribution have been produced and deformed in compression at two different temperatures (200 C and 250 C) and strain rates in the ranges of 200 C to 250 C and 10{sup {minus}5} to 10{sup {minus}2} s{sup {minus}1}, respectively. The particle size distribution measurements performed in a scanning microscope in back-scattered mode demonstrated a double peak behavior depending on temperature: at the lowest test temperature, the dynamic coarsening is enhanced at the highest strain rate, while at 250 C, the coarsening seems to be affected by crushing of small and medium size particles during straining.

• Sponsoring Organization: USDOE
• OSTI ID: 474111
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 2 Vol. 28; ISSN 1073-5623; ISSN MMTAEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
COPPER ALLOYS
DEFORMATION
GRAIN GROWTH
HEAT TREATMENTS
MICROSTRUCTURE
PARTICLE SIZE
STRAIN RATE
TEMPERATURE DEPENDENCE