scholarly journals Precipitation hardening and recrystallization of Al-0.3wt.% Zr alloys of various grades

1968 ◽  
Vol 18 (10) ◽  
pp. 517-523 ◽  
Author(s):  
Seiichi NISHIKAWA ◽  
Nobuo NAGASHIMA ◽  
Tetsuo SAWAGUCHI ◽  
Shigeyoshi KOBAYASHI
Keyword(s):  
Precipitation Hardening ◽  
Zr Alloys

Precipitation in Al-Li-Zr alloys

1992 ◽  
Vol 50 (1) ◽  
pp. 186-187
Author(s):  
D.M. Vanderwalker
Keyword(s):  
Fracture Toughness ◽  
Precipitation Hardening ◽  
Weight Ratio ◽  
High Strength ◽  
Transmission Electron ◽  
Water Quench ◽  
Aluminum Lithium ◽  
Aluminum Lithium Alloys ◽  
Lithium Alloys ◽  
Zr Alloys

Aluminum-lithium alloys have a low density and high strength to weight ratio. They are being developed for the aerospace industry.The high strength of Al-Li can be attributed to precipitation hardening. Unfortunately when aged, Al-Li aquires a low ductility and fracture toughness. The precipitate in Al-Li is part of a sequence SSSS → Al3Li → AlLi A description of the phases may be found in reference 1 . This paper is primarily concerned with the Al3Li phase. The addition of Zr to Al-Li is being explored to find the optimum in properties. Zirconium improves fracture toughness and inhibits recrystallization. This study is a comparision between two Al-Li-Zr alloys differing in Zr concentration.Al-2.99Li-0.17Zr(alloy A) and Al-2.99Li-0.67Zr (alloy B) were solutionized for one hour at 500oc followed by a water quench. The specimens were then aged at 150°C for 16 or 40 hours. The foils were punched into 3mm discs. The specimens were electropolished with a 1/3 nitric acid 2/3 methanol solution. The transmission electron microscopy was conducted on the JEM 200CX microscope.

Precipitation hardening and recrystallization behavior of Al Mg Er Zr alloys

2016 ◽  
Vol 687 ◽  
pp. 143-151 ◽  
Author(s):  
S.P. Wen ◽  
W. Wang ◽  
W.H. Zhao ◽  
X.L. Wu ◽  
K.Y. Gao ◽  
...  
Keyword(s):  
Precipitation Hardening ◽  
Recrystallization Behavior ◽  
Zr Alloys

Role of Yb and Si on the precipitation hardening and recrystallization of dilute Al–Zr alloys

2014 ◽  
Vol 599 ◽  
pp. 65-70 ◽  
Author(s):  
S.P. Wen ◽  
K.Y. Gao ◽  
H. Huang ◽  
W. Wang ◽  
Z.R. Nie
Keyword(s):  
Precipitation Hardening ◽  
Zr Alloys

Precipitation hardening of Ir-Nb and Ir-Zr alloys

1998 ◽  
Vol 40 (1) ◽  
pp. 109-115 ◽  
Author(s):  
Y. Yamabe-Mitarai ◽  
Y. Ro ◽  
T. Maruko ◽  
H. Harada
Keyword(s):  
Precipitation Hardening ◽  
Zr Alloys

scholarly journals Precipitation hardening in dilute Al–Zr alloys

2018 ◽  
Vol 7 (1) ◽  
pp. 66-72 ◽  
Author(s):  
Pedro Henrique Lamarão Souza ◽  
Carlos Augusto Silva de Oliveira ◽  
José Maria do Vale Quaresma
Keyword(s):  
Precipitation Hardening ◽  
Zr Alloys

scholarly journals Heat Treatment of Cast and Cold Rolled Al–Yb and Al–Mn–Yb–Zr Alloys

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7122
Author(s):  
Veronika Kodetová ◽  
Martin Vlach ◽  
Lucia Bajtošová ◽  
Michal Leibner ◽  
Hana Kudrnová ◽  
...  
Keyword(s):  
Precipitation Hardening ◽  
Positive Influence ◽  
Number Density ◽  
Initial State ◽  
The Matrix ◽  
Cold Rolled ◽  
Relative Resistivity ◽  
The Difference ◽  
20 Nm ◽  
Zr Alloys

The microstructure, electrical properties and microhardness of as-cast and cold rolled AlYb and AlMnYbZr alloys were investigated. The addition of Mn, Yb and Zr has a positive influence on grain size. A deformed structure of the grains with no changes of their size was observed after cold rolling. The Al3Yb particles coherent with the matrix were observed in the AlYb alloys. The size of the particles was about 20 nm in the initial state; after isochronal treatment up to 540 °C the particles coarsen, and their number density was lower. The deformation has a massive effect on the microhardness behavior until treatment at 390 °C, after which the difference in microhardness changes between as-cast and cold rolled alloys disappeared. Relative resistivity changes show a large decrease in the temperature interval of 330–540 °C which is probably caused by a combination of recovery of dislocations and precipitation of the Al3(Yb,Zr) particles. Precipitation hardening was observed between 100 and 450 °C in the AlYb alloy after ageing at 625 °C/24 h and between 330 and 570 °C in the AlMnYbZr alloy after ageing at 625 °C/24 h.

Precipitation hardening of Cu – Ti – Zr alloys

2004 ◽  
Vol 20 (7) ◽  
pp. 849-858 ◽  
Author(s):  
R. Markandeya ◽  
S. Nagarjuna ◽  
D.S. Sarma
Keyword(s):  
Precipitation Hardening ◽  
Zr Alloys

THE STRUCTURE OF AMORPHOUS Ni-Zr ALLOYS

1985 ◽  
Vol 46 (C8) ◽  
pp. C8-181-C8-185
Author(s):  
A. E. Lee ◽  
S. Jost ◽  
Ch. N.J. Wagner ◽  
L. E. Tanner
Keyword(s):  
Zr Alloys
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