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Article
Multi-Objective Optimization of Process Parameters in Resistance Spot Welding of A36 Mild Steel and Hot Dipped Galvanized Steel Sheets Using Non-dominated Sorting Genetic Algorithm
Industry is constantly moving towards an increasing of production speed while minimizing production costs. This paper presents an efficient method for minimizing production times and energies through optimizat...
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Article
Effect of Double Hit Hot Deformation on the Evolution of Dynamically Transformed Ferrite
Double-hit hot compression tests were carried on medium-carbon low-alloy steels using Gleeble 3800® thermomechanical simulator. The experiments were performed at strain rates of 0.25 and 0.5 s−1 and temperatures ...
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Article
Modeling of Phase Transformation Kinetics in Resistance Spot Welding and Investigation of Effect of Post Weld Heat Treatment on Weld Microstructure
In recent years, the usage of dual phase (DP) steels, transformation induced plasticity (TRIP) steels and boron steels in some auto body parts has become a necessity because of their strength and lightweight. ...
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Article
Influence of Process Parameters on Microstructure Evolution During Hot Deformation of a Eutectic High-Entropy Alloy (EHEA)
High-entropy alloys (HEAs) have shown unique combinations of strength and ductility along with other properties after optimized thermomechanical processing (TMP). In this study, the hot deformation of an AlCoC...
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Article
The Effect of Retained Work Hardening on the Driving Force for Dynamic Transformation
The driving force for dynamic transformation during double-hit hot compression of an as-cast medium-carbon low-alloy steel assessed done at 1473 K at strain rates of 0.25 and 0.50 s−1. Dynamically transformed fer...
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Article
Simulation and experimental validation of the effect of superheat on macrosegregation in large-size steel ingots
A 3D model was employed to study the effect of melt initial superheat on the macrosegregation formation using FE modeling and experimentation methods. The casting process of three ingots with the initial melt ...
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Article
Optimization of resistance spot welding process applied to A36 mild steel and hot dipped galvanized steel based on hardness and nugget geometry
Resistance spot welding (RSW), a process intensively used for thin metal sheets assembly in automotive, railway, and aeronautical industries, has always presented technical and economic challenges. Thermal dis...
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Article
Influence of thermomechanical shrinkage on macrosegregation during solidification of a large-sized high-strength steel ingot
Finite element modeling (FEM) validated by experimental work was used to simulate the influence of thermomechanical shrinkage on macrosegregation of alloying elements in a large-sized ingot of high-strength st...
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Chapter and Conference Paper
An Approach to Develop Hansel–Spittel Constitutive Equation during Ingot Breakdown Operation of Low Alloy Steels
The control of the final quality of a forged product requires an in-depth comprehension of quality of the initial casted ingot. Hot workability is an important property which can be evaluated by variation of s...
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Article
Deformation and Recrystallization Behavior of the Cast Structure in Large Size, High Strength Steel Ingots: Experimentation and Modeling
Constitutive modeling of the ingot breakdown process of large size ingots of high strength steel was carried out through comprehensive thermomechanical processing using Gleeble 3800® thermomechanical simulator, f...
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Article
Erratum to: Effect of process parameters on microstructure and mechanical properties of friction stir-welded Ti–6Al–4V joints
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Article
Effect of process parameters on microstructure and mechanical properties of friction stir-welded Ti–6Al–4V joints
In this work, the microstructure and mechanical behavior of friction stir-welded 2-mm-thick sheets of Ti–6Al–4V alloy were investigated. Specifically, the influence of friction stir welding (FSW) process param...
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Article
On the Occurrence of Liquation During Linear Friction Welding of Ni-Based Superalloys
A combination of experimental and analytical methods was used to study the possible occurrence of liquation during LFW of the newly developed AD730TM Ni-based superalloy. LFWed joints were produced using a semi-i...
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Article
Influence of predeformation on microstructure evolution of superplastically formed Al 5083 alloy
Cavitation is the main defect encountered during superplastic forming (SPF) of thin sheet aluminum alloys. In the present paper, the influence of preforming operation (cold or hot) on the superplastic forming ...
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Article
Open AccessKinetics and Mechanisms of γ′ Reprecipitation in a Ni-based Superalloy
The reprecipitation mechanisms and kinetics of γ′ particles during cooling from supersolvus and subsolvus temperatures were studied in AD730TM Ni-based superalloy using Differential Thermal Analysis (DTA). The ev...
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Article
Mechanical and Metallurgical Evolution of Stainless Steel 321 in a Multi-step Forming Process
This paper examines the metallurgical evolution of AISI Stainless Steel 321 (SS 321) during multi-step forming, a process that involves cycles of deformation with intermediate heat treatment steps. The multi-s...
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Chapter
The Effect of Strain Reversal during High Pressure Torsion on the Microstructure Evolution and Texture of Aluminum Alloys
The present work investigated the effect of strain reversal during high pressure torsion on the evolution of microstructure, texture and hardness properties of two different materials with different dynamic re...
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Article
Characteristics of Austenite Transformation During Post Forge Cooling of Large-Size High Strength Steel Ingots
The application of large-size plastic injection molds is continuously increasing in automotive and aerospace industries. Having uniform hardenability over the entire volume of the large forged steel blocks is ...
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Article
Predicting residual stresses and distortion during multisequence welding of large size structures using FEM
A three-dimensional thermomechanical finite element (FE) analysis is carried out to model and predict the influence of welding sequence on the generation of distortions and residual stresses in large size T-jo...
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Article
Thermomechanical Characterization of Mg-9Al-1Zn Alloy Using Power Dissipation Maps
A processing map is developed on the basis of the Dynamic Material Model for Mg-9Al-1Zn. The model considers the work piece as a dissipator of power and power loss variation with temperature and strain rate co...
