Improved structural homogeneity and mechanical properties of nanoparticles reinforced Al composites after orthogonal thermomechanical processes

2018 ◽  
Vol 767 ◽  
pp. 293-301 ◽  
Author(s):  
Jun Liu ◽  
Zhe Chen ◽  
Fengguo Zhang ◽  
Gang Ji ◽  
Yu Ma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Structural Homogeneity ◽  
Thermomechanical Processes

scholarly journals Formation of microstructure and properties of Cu-3Ti alloy in thermal and thermomechanical processes

2017 ◽  
Vol 62 (1) ◽  
pp. 223-230 ◽  
Author(s):  
A. Szkliniarz
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Plastic Deformation ◽  
Cold Working ◽  
Cold Deformation ◽  
Solution Treatment ◽  
Cold Plastic Deformation ◽  
Working Solution ◽  
Thermomechanical Processes ◽  
Selection Of

Abstract This paper presents the possibilities of forming the microstructure as well as mechanical properties and electrical conductivity of Cu-3Ti alloy (wt.%) in thermal and thermomechanical processes that are a combination of homogenising treatment, hot and cold working, solution treatment and ageing. Phase composition of the alloy following various stages of processing it into the specified semi-finished product was being determined too. It was demonstrated that the application of cold plastic deformation between solution treatment and ageing could significantly enhance the effect of hardening of the Cu-3Ti alloy without deteriorating its electrical conductivity. It was found that for the investigated alloy the selection of appropriate conditions for homogenising treatment, hot and cold deformation as well as solution treatment and ageing enables to obtain the properties comparable to those of beryllium bronzes.

scholarly journals Modification of Microstructure and Texture in Highly Non-Flammable Mg-Al-Zn-Y-Ca Alloy Sheets by Controlled Thermomechanical Processes

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 181 ◽  
Author(s):  
Sangbong Yi ◽  
José Victoria-Hernández ◽  
Young Kim ◽  
Dietmar Letzig ◽  
Bong You
Keyword(s):  
Mechanical Properties ◽  
Transverse Direction ◽  
Texture Evolution ◽  
Rolling Direction ◽  
Reduction Degree ◽  
Rolling Schedule ◽  
Texture Type ◽  
Basal Pole ◽  
Thermomechanical Processes ◽  
Basal Type

The influence of rolling temperature and pass reduction degree on microstructure and texture evolution was investigated using an AZXW3100 alloy, Mg-3Al-1Zn-0.5Ca-0.5Y, in wt.%. The change in the rolling schedule had a significant influence on the resulting texture and microstructure from the rolling and subsequent annealing. A relatively strong basal-type texture with a basal pole split into the rolling direction was formed by rolling at 450 °C with a decreasing scheme of the pass reduction degrees with a rolling step, while the tilted basal poles in the transverse direction were developed by using an increasing scheme of the pass reduction degrees. Rolling at 500 °C results in a further distinct texture type with a far more largely tilted basal pole into the rolling direction. The directional anisotropy of the mechanical properties in the annealed sheets was caused by the texture and microstructural features, which were in turn influenced by the rolling condition. The Erichsen index of the sheets varied in accordance to the texture sharpness, i.e., the weaker the texture the higher the formability. The sheet with a tetrarchy distribution of the basal poles into the transverse and rolling directions shows an excellent formability with an average Erichsen index of 8.1.

Austenite Grain Refinement in Direct Charging Based Thermomechanical Processes

2012 ◽  
Vol 715-716 ◽  
pp. 711-718 ◽  
Author(s):  
J.M. Rodriguez-Ibabe ◽  
Beatriz López
Keyword(s):  
Mechanical Properties ◽  
Applied Strain ◽  
Microalloyed Steels ◽  
Austenite Grain Size ◽  
Austenite Grain ◽  
Steel Grades ◽  
Near Net Shape ◽  
Thermomechanical Processes ◽  
Tailored Design ◽  
Kinetics Of

Thermomechanical processes based on direct charging routes combined with near net shape technologies have become one of the main industrial production routes. The singularity of the coarse as cast initial austenite grain size, combined with the limited total applied strain during hot working, requires a tailored design of the composition and deformation schedules in order to achieve the required mechanical properties. This becomes more and more complex as higher steel grades combined with thicker sections are incorporated into production. This paper reviews the role played by the interaction of dynamic-metadynamic-static recrystallisation and strain induced precipitation on achieving the finest and most homogeneous austenite microstructures as possible, prior to transformation in the case of Nb, Nb-Mo and Ti microalloyed steels. Special emphasis will be put on the relevance of the kinetics of combined postdynamic softening mechanisms before a complete stop of recrystallisation due to precipitation occurs.

Effect of Different Thermomechanical Processes on the Microstructure, Texture, and Mechanical Properties of API 5L X70 Steel

2018 ◽  
Vol 27 (4) ◽  
pp. 1694-1705 ◽  
Author(s):  
Mohammad Masoumi ◽  
Edwan Anderson Ariza Echeverri ◽  
Cleiton Carvalho Silva ◽  
Miloslav Béreš ◽  
Hamilton Ferreira Gomes de Abreu
Keyword(s):  
Mechanical Properties ◽  
Thermomechanical Processes ◽  
Api 5L X70 Steel

Effect of Thermomechanical Processing on Electrical and Mechanical Properties of Aluminum Conductor Alloys

2014 ◽  
Vol 794-796 ◽  
pp. 1121-1126 ◽  
Author(s):  
Lei Pan ◽  
Bruno Bourassa ◽  
X. Grant Chen
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Thermomechanical Processing ◽  
Electron Backscatter Diffraction ◽  
Subgrain Size ◽  
Iron Concentration ◽  
Hot Extrusion ◽  
Tensile Tests ◽  
Optical Microscope ◽  
Thermomechanical Processes

The effect of different thermomechanical processes (hot extrusion and Properzi continuous rolling) on the electrical and mechanical properties of the Al-Fe aluminum conductor alloys was investigated. The microstructural evolution of the supply rods was characterized by an optical microscope, a transmission electron microscope and the electron backscatter diffraction technique (EBSD). Tensile tests and electrical conductivity measurements were carried out at room temperature on the supply rods. Results showed that, at the same Fe content, the continuously rolled rods demonstrated higher tensile strength but lower elongation and electrical conductivity compared with those of the extruded rods. A partially recrystallized structure along with a big subgrain size appeared in the extruded rods while only a dynamic recovery with a small subgrain size was found in the continuously rolled rods. The precipitation of iron-rich dispersoids was observed in the extruded rods and is associated with a depletion of the iron concentration.

Influence of the Thermo-Mechanical Treatment on the Properties and Microstructure of High Manganese Austenitic-Ferritic Steel

2015 ◽  
Vol 226 ◽  
pp. 75-78
Author(s):  
Magdalena Jabłońska ◽  
Dariusz Kuc ◽  
Grzegorz Niewielski ◽  
Bartosz Chmiela
Keyword(s):  
Mechanical Properties ◽  
Ferritic Steel ◽  
Construction Materials ◽  
High Strength ◽  
High Manganese ◽  
Reduced Cross Section ◽  
Railway Industry ◽  
Thermomechanical Processes ◽  
Hot Rolled ◽  
New Generation

New generation high-strength austenitic and austenitic-ferritic manganese steels represent a valid potential in applications for components in the automotive and railway industry due to the perfect combination of high mechanical properties and formability. Applying this new steels with their combination of properties allows for reduce the weight of vehicles by the use reduced cross-section components and thus to reduce fuel consumption. The development and implementation of industrial production and the use as construction materials such interesting and promising steel is conditioned to improve their casting properties and susceptibility to deformation during thermomechanical processes conditions. In this work, applied an new high manganese austenitic-ferritic steel for analysis the influence of the cooling medium in thermomechanical processes on the mechanical properties and structure of researched steel. The steel was hot rolled with finish temperature 900°C and next cooled with different conditions. Change the cooling conditions effect on the changes in the microstructure of the tested steel, observed grain refinement of austenite and ferrite morphology change. Also are changing the mechanical characteristics of the tested steel.

scholarly journals Sustainable Additive Manufacturing: Mechanical Response of Polypropylene over Multiple Recycling Processes

2020 ◽  
Vol 13 (1) ◽  
pp. 159
Author(s):  
Nectarios Vidakis ◽  
Markos Petousis ◽  
Lazaros Tzounis ◽  
Athena Maniadi ◽  
Emmanouil Velidakis ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Polymeric Materials ◽  
Fused Filament Fabrication ◽  
Scanning Calorimetry ◽  
3D Printed ◽  
Thermomechanical Processes ◽  
Multiple Recycling ◽  
Plastic Parts ◽  
Polymer Crystallinity

The recycling of polymeric materials has received a steadily growing scientific and industrial interest due to the increase in demand and production of durable and lightweight plastic parts. Recycling of such materials is mostly based on thermomechanical processes that significantly affect the mechanical, as well as the overall physicochemical properties of polymers. The study at hand focuses on the recyclability of Fused Filament Fabrication (FFF) 3D printed Polypropylene (PP) for a certain number of recycling courses (six in total), and its effect on the mechanical properties of 3D printed parts. Namely, 3D printed specimens were fabricated from non-recycled and recycled PP material, and further experimentally tested regarding their mechanical properties in tension, flexion, impact, and microhardness. Comprehensive dynamic scanning calorimetry (DSC), thermogravimetric analysis (TGA), Raman spectroscopy, and morphological investigations by scanning electron microscopy (SEM) were performed for the different 3D printed PP samples. The overall results showed that there is an overall slight increase in the material’s mechanical properties, both in tension and in flexion mode, while the DSC characterization indicates an increase in the polymer crystallinity over the recycling course.

Sign in / Sign up

Export Citation Format

Share Document