Thermomechanical Treatment of 2124 PM Aluminum Alloys with Low and High Dispersoid Levels

2008 ◽  
pp. 333-333-21 ◽  
Author(s):  
B Sarkar ◽  
W Barry Lisagor
2020 ◽  
Vol 22 (8) ◽  
pp. 2000193 ◽  
Author(s):  
Emad Scharifi ◽  
Seyed Vahid Sajadifar ◽  
Ghazal Moeini ◽  
Ursula Weidig ◽  
Stefan Böhm ◽  
...  

2020 ◽  
Vol 22 (8) ◽  
pp. 2070033
Author(s):  
Emad Scharifi ◽  
Seyed Vahid Sajadifar ◽  
Ghazal Moeini ◽  
Ursula Weidig ◽  
Stefan Böhm ◽  
...  

2015 ◽  
Vol 56 (9-10) ◽  
pp. 483-488 ◽  
Author(s):  
N. T. Kareva ◽  
Yu. D. Koryagin

Author(s):  
M.T. Jahn ◽  
J.C. Yang ◽  
C.M. Wan

4340 Ni-Cr-Mo alloy steel is widely used due to its good combination of strength and toughness. The mechanical property of 4340 steel can be improved by various thermal treatments. The influence of thermomechanical treatment (TMT) has been studied in a low carbon Ni-Cr-Mo steel having chemical composition closed to 4340 steel. TMT of 4340 steel is rarely examined up to now. In this study we obtain good improvement on the mechanical property of 4340 steel by TMT. The mechanism is explained in terms of TEM microstructures4340 (0.39C-1.81Ni-0.93Cr-0.26Mo) steel was austenitized at 950°C for 30 minutes. The TMTed specimen (T) was obtained by forging the specimen continuously as the temperature of the specimen was decreasing from 950°C to 600°C followed by oil quenching to room temperature. The thickness reduction ratio by forging is 40%. The conventional specimen (C) was obtained by quenching the specimen directly into room temperature oil after austenitized at 950°C for 30 minutes. All quenched specimens (T and C) were then tempered at 450, 500, 550, 600 or 650°C for four hours respectively.


Author(s):  
M. Raghavan ◽  
J. Y. Koo ◽  
J. W. Steeds ◽  
B. K. Park

X-ray microanalysis and Convergent Beam Electron Diffraction (CBD) studies were conducted to characterize the second phase particles in two commercial aluminum alloys -- 7075 and 7475. The second phase particles studied were large (approximately 2-5μm) constituent phases and relatively fine ( ∼ 0.05-1μn) dispersoid particles, Figures 1A and B. Based on the crystal structure and chemical composition analyses, the constituent phases found in these alloys were identified to be Al7Cu2Fe, (Al,Cu)6(Fe,Cu), α-Al12Fe3Si, Mg2Si, amorphous silicon oxide and the modified 6Fe compounds, in decreasing order of abundance. The results of quantitative X-ray microanalysis of all the constituent phases are listed in Table I. The data show that, in almost all the phases, partial substitution of alloying elements occurred resulting in small deviations from the published stoichiometric compositions of the binary and ternary compounds.


1987 ◽  
Vol 48 (C3) ◽  
pp. C3-653-C3-659 ◽  
Author(s):  
M. NIINOMI ◽  
K. DEGAWA ◽  
T. KOBAYASHI

2015 ◽  
Vol 6 (3) ◽  
pp. 65
Author(s):  
E. H. Ouakdi ◽  
A. Soualem ◽  
T. Rechidi ◽  
M. Martiny ◽  
G. Ferron

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