Enhanced high-temperature age-hardening behavior and mechanical properties of Al–Mg–Si alloys via microalloying with Cd

2021 ◽  
Vol 825 ◽  
pp. 141910
Author(s):  
Gang Lu ◽  
Bo Sun ◽  
Jianjun Wang ◽  
Yujie Liu ◽  
Chunming Liu
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Age Hardening ◽  
Hardening Behavior

scholarly journals Homogenization-induced age-hardening behavior and room temperature mechanical properties of Mg-4Zn-0.5Ca-0.16Mn (wt%) alloy

2019 ◽  
Vol 164 ◽  
pp. 107554 ◽  
Author(s):  
Partha Duley ◽  
Souriddha Sanyal ◽  
T.K. Bandyopadhyay ◽  
Sumantra Mandal
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Age Hardening ◽  
Hardening Behavior

Modeling the Microstructural and Yield Strength Evolution of an Age-Hardenable Al Alloy for High Temperature Applications

2016 ◽  
Vol 879 ◽  
pp. 380-385 ◽  
Author(s):  
Marco Colombo ◽  
Elisabetta Gariboldi ◽  
Paola Bassani ◽  
Mihaela Albu ◽  
Ferdinand Hofer
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Yield Strength ◽  
Elevated Temperatures ◽  
Age Hardening ◽  
Homogeneous Distribution ◽  
Al Alloy ◽  
Physically Based ◽  
The Matrix ◽  
Physically Based Models

The mechanical properties of Al alloys are strongly affected by their microstructure: the size and shape of precipitates, their homogeneous distribution and their coherency with the matrix are of primary importance for an effective strengthening of the alloys at room and elevated temperatures. Physically-based models are powerful tools to predict the influence of the mentioned parameters on the mechanical properties of the alloy after age hardening, and also to predict the effect of high temperature service conditions on microstructure evolution. Scope of this work is to model the dimensional kinetic evolution of plate shaped precipitates of an Al-based alloy during aging and after different overaging times at elevated temperature, and use these results to estimate the alloy yield strength. The alloy strengthening response is due to three terms, linearly summed: the intrinsic strength of Aluminum, the contribution from solute in solid solution and the contribution arising from precipitates. The consistency of the model is verified with experimental data obtained from a 2014 Al alloy.

Age Hardening Behavior of Al-Li Alloys Produced by Sand Mold Process

2016 ◽  
Vol 879 ◽  
pp. 1629-1633
Author(s):  
Seiji Saikawa ◽  
Chiharu Otsubo ◽  
Susumu Ikeno ◽  
Koichi Komai
Keyword(s):  
Mechanical Properties ◽  
Sand Mold ◽  
Age Hardening ◽  
Peak Hardness ◽  
Metal Mold ◽  
Hardening Behavior ◽  
Highly Active ◽  
Solution Treated ◽  
Mold Casting ◽  
Good Material

Al-Li alloys have higher mechanical properties and more lightweight than other conventional aluminum alloys. Therefore , it is focused as a good material for weight reduction of industrial fields. However, since the Al-Li alloy are highly active and hard to cast, there has been limited research on casting. In this study, age-hardening behavior of Al-2.5mass%Li alloys cast into sand and metal mold were investigated. All alloys cast into Y-block shape sand mold, and then artificial aged after solution treated at 743K for 36ks. Because of difference in quantity of precipitation by metastable δ’(Al3Li) phase, peak hardness of metal mold casting is higher than that of sand molds castings.

scholarly journals Relationship between mechanical properties and age-hardening behavior around grain boundaries of Al-Mg-Si alloy

2020 ◽  
Vol 326 ◽  
pp. 03002
Author(s):  
Takuya Hashimoto ◽  
Ken-ichi Ikeda ◽  
Seiji Miura
Keyword(s):  
Mechanical Properties ◽  
Rotation Angle ◽  
Coincident Site Lattice ◽  
Age Hardening ◽  
Precipitation Behavior ◽  
Site Lattice ◽  
Hardening Behavior ◽  
Aging Precipitation ◽  
Peak Aged ◽  
Electron Back Scattered Diffraction

Nanoindentation tests were conducted near the grain boundary (GB) of the Al-Mg-Si alloy, and the influence of GB character on the aging precipitation behavior and the mechanical properties was confirmed. After obtaining the GB characters by electron back scattered diffraction (EBSD) analysis, nanoindentation tests were carried out on under-aged, peak-aged, and over-aged samples. And then, the indentation areas were observed by back scattered electrons imaging (BSE) in order to identify indentation positions with respect to the GB. In this study, for the GB character, focusing on the rotation angle, the high-angle GB (HAGB) and the low-angle GB (LAGB) were selected. In addition, coincident site lattice GBs (CSL) were selected as the special GB. In the 180°C under-aged samples, the nano-hardness near GB is higher than that far from GB, while 180°C peak-aged samples, the nano-hardness is lower than that far from GB. Then the range near the GB where the hardness changes was larger at HAGB than at LAGB and CSL3. This suggests that the GB character affects the aging precipitation behavior and mechanical properties.

CIRCLE L17

Alloy Digest ◽  
1958 ◽  
Vol 7 (3) ◽  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Heat Treating ◽  
Treatment Temperature ◽  
Age Hardening ◽  
Temperature Performance ◽  
Type Stainless Steel

Abstract CIRCLE L17 is an age-hardening type of stainless steel having the desirable mechanical properties of the hardenable chromium type corrosion resisting steel combined with workability and corrosion resistance approaching 18-8 type stainless steel. It is hardenable by heat treatment to Rockwell C40-45. Cracking, distortion, decarburization, scaling and similar problems encountered after machining are virtually eliminated due to the low heat treatment temperature required for hardening. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: SS-71. Producer or source: Lebanon Steel Foundry.

scholarly journals Evolution of Mechanical Behavior of 6XXX Aluminium Alloy due to the Precipitation State During a Thermo-Mechanical Process

2013 ◽  
Author(s):  
Didier Bardel ◽  
Michel Perez ◽  
Daniel Nelias ◽  
Thibaut Chaise ◽  
Jerôme Garnier ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Aluminium Alloy ◽  
Coupled Model ◽  
Theoretical Background ◽  
Age Hardening ◽  
General Idea ◽  
Hardening Behavior ◽  
Fea Model ◽  
Microstructural Model

The aim of this research is to link the microstructural state and the mechanical properties of an age hardening alloy during a fast heat treatment such as encountered during welding. A coupled model between precipitation state and mechanical properties is used to predict the yield strength and hardening behavior that can be observed experimentally. The method permits the identification of the kinematic and isotropic contributions in the hardening model. The methodology is applied to a 6061-T6 aluminium alloy which is used in the Jules Horowitz reactor vessel. The general idea of this methodology is to couple an efficient microstructural model to a mechanical one based on the dislocation theory and ad’hoc experiments. The theoretical background is based on the work of Kampmann and Wagner, known as the KWN model, to account for nucleation, growth/dissolution and coarsening of precipitates. This analysis requires transient thermo-mechanical experimental data. The efficiency of these models and their coupling are shown for a serie 6XXX aluminium alloy which contains β″ and β′ precipitates. Ultimately these models are coupled to a FEA model and allows to predict the distribution of precipitates within each element of the mesh, and subsequently its mechanical behavior.

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