STRENGTHENING FEATURES AND AGING KINETICS OF HIGH-STRENGTH CAST ALUMINUM ALLOY AL4MS BASED ON Al–Si–Cu–Mg SYSTEM

2021 ◽  
pp. 24-34
Author(s):  
E.N. Kablov ◽  
◽  
E.V. Belov ◽  
A.V. Trapeznikov ◽  
A.A. Leonov ◽  
...  
Keyword(s):  
High Strength ◽  
Cast Aluminum Alloy ◽  
High Plasticity ◽  
Cast Aluminum ◽  
Second Stage ◽  
Low Temperature Aging ◽  
Aging Kinetics ◽  
Kinetics Of ◽  
Cold Box ◽  
Temperature Aging

Based on the conducted research, it has been found that quenching with hot isostatic pressure and step-by-step aging with consistently increasing temperatures of low-temperature aging (first stage) and high-temperature aging (second stage) provides high tensile strength for AL4MS copper silumin during cold box casting, increases the flow stress by 10%, and maintains high plasticity compared to the level of properties after single-stage aging.

Processing of Al-Cu-Mg Alloy (V65 Grade) Bars as Feedstock for Wire Drawing

2012 ◽  
Vol 710 ◽  
pp. 167-173 ◽  
Author(s):  
Niraj Nayan ◽  
S.V.S. Narayana Murty ◽  
Abhay Kumar Jha ◽  
S.C. Sharma ◽  
K. Sreekumar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solution Treatment ◽  
Natural Aging ◽  
Wire Drawing ◽  
Direct Chill ◽  
High Plasticity ◽  
Aging Response ◽  
Different Temperatures ◽  
Aging Kinetics ◽  
Kinetics Of

Al-Cu-Mg (Russian grade V65) alloys are used for riveting applications in aerospace industries due to relatively high shear strength of the order of 25 kg/mm2 combined with a high plasticity. The main advantage of using V65 aluminum alloy for rivet application comes from its significantly slower natural aging response, which gives flexibility to carryout riveting operation even after 4 days after solution heat treatment and natural aging at room temperature. This very valuable feature is not found in its counterpart alloy AA2024 where due to rapid aging kinetics of this alloy, the riveting operation must be completed within 30 min of the solution treatment, which is many times impractical. This paper presents the processing of V65 aluminium alloy by Direct Chill (DC) casting followed by subsequent secondary processing through extrusion and forging to realize feedstock for caliber rolling. These ingots were caliber rolled to 12 mm diameter rods at different temperatures and mechanical properties were evaluated in T6 and T4 tempers. Detailed microstructural examination using optical microscopy and fractography of the tensile tested samples using scanning electron microscopy were carriedout to correlate microstructure and mechanical properties.

scholarly journals Влияние низкотемпературной термообработки на развитие сверхэластичности в монокристаллах Ti-50.6 at.% Ni

2019 ◽  
Vol 45 (3) ◽  
pp. 55
Author(s):  
Е.Е. Тимофеева ◽  
Н.Ю. Суриков ◽  
А.И. Тагильцев ◽  
А.С. Ефтифеева ◽  
А.Б. Тохметова ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Low Temperature ◽  
Single Crystals ◽  
High Strength ◽  
Strength Properties ◽  
Martensite Formation ◽  
Nanoscale Particles ◽  
Low Temperature Aging ◽  
Temperature Aging

AbstractAs a result of low-temperature aging at 573 K for 1.5 h of Ti–50.6 at% Ni [001]-oriented single crystals quenched from 1253 K, a high-strength state is obtained due to the precipitation of Ti_3Ni_4 nanoscale particles ( d < 10 nm). The aging leads to the development of the B 2– B 19' martensitic transformation through an intermediate R phase, a reduction in the B 19' martensite formation temperatures by 40–60 K, an increase in the strength properties of the B 2 phase from 730 to 2100 MPa, and an extension of the superelasticity interval Δ T _SE in compression from Δ T _SE = 60 to 170 K (compared to quenched crystals).

CARPENTER NIMARK 300

Alloy Digest ◽  
1987 ◽  
Vol 36 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
High Strength ◽  
Heat Treating ◽  
Pressure Vessels ◽  
Low Carbon ◽  
Temperature Performance ◽  
Nickel Cobalt ◽  
Low Temperature Aging ◽  
Temperature Aging

Abstract CARPENTER NIMARK 300 is a vacuum-melted, low-carbon nickel-cobalt-molybdenum maraging steel that develops yield strengths in excess of 270,000 psi (1862 MPa) by simple low-temperature aging at 900 F (482 C) following a solution anneal. It is readily weldable and exhibits good ductility at high strength levels and excellent notch ductility. Its many uses include aircraft structural assemblies, pressure vessels, shafting, bolts and fasteners, and rocket motor cases. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on low and high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-423. Producer or source: Carpenter.

Low-Temperature Aging Kinetics in Cast Duplex Stainless Steels: Experimental Characterization

1997 ◽  
Vol 25 (2) ◽  
pp. 154 ◽  
Author(s):  
DR Petersen ◽  
RE Link ◽  
JJ González ◽  
F Gutiérrez-Solana ◽  
L Sánchez ◽  
...  
Keyword(s):  
Low Temperature ◽  
Stainless Steels ◽  
Duplex Stainless Steels ◽  
Experimental Characterization ◽  
Low Temperature Aging ◽  
Aging Kinetics ◽  
Temperature Aging

The New Approach to Produce Al Sheets with UFG Structure Using SPD Processing

2008 ◽  
Vol 584-586 ◽  
pp. 176-181
Author(s):  
N.F. Yunusova ◽  
Rinat K. Islamgaliev ◽  
I.F. Safiullin ◽  
Ruslan Valiev
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
High Strength ◽  
Short Term ◽  
New Approach ◽  
Rolled Material ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Low Temperature Aging ◽  
Temperature Aging

Microstructure and mechanical properties of the ultrafine-grained (UFG) 1421 aluminum alloy processed by equal channel angular pressing (ECAP) have been studied. This UFG material was successfully rolled under the conditions of superplasticity. It was established that the rolled material exhibited not only the enhanced superplasticity, but also high strength retaining initial ductility at room temperature after additional short-term annealing and low-temperature aging.

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