-
Article
High-speed synchrotron x-ray imaging and multi-physics modeling of molten pool and gas dynamics in laser additive manufacturing of a medium-entropy alloy
The molten pool dynamics of a NiCoCr medium-entropy alloy during laser conduction melting were observed using an in situ high-speed synchrotron x-ray radiography. The multi-physics modeling was performed to an...
-
Article
Analytical prediction of shot peening residual stress distribution using inherent strain in aluminum–magnesium alloy plates under various peening conditions
The compressive residual stress distribution in shot peening can be simulated using the nonlinear elastic–plastic finite element method (FEM) or obtained using various measurement methods; however, a simple an...
-
Article
Measurement and Identified Prediction Equation for Residual Stress Distribution in Aluminum Alloy A5052 under Various Pneumatic Shot Peening Conditions
Pneumatic shot peening with zircon shot of four different diameters was performed on an aluminum alloy. The effects of air pressure, shot diameter, and material on shot velocity were experimentally investigate...
-
Article
Thermal–Mechanical Analysis of Welding Deformation and Residual Stress in TS1500/SPC1180 Lap Joints Using Cold Metal Transfer Welding
The ongoing requirement for the lightweight design of automotive resulted in the wide application of ultra-high-strength steel (UHSS), such as the 1500 MPa made by hot stam** (TS1500) and 1180 MPa manufactur...
-
Article
Open AccessPrediction of the fatigue curve of high-strength steel resistance spot welding joints by finite element analysis and machine learning
The process of resistance spot welding is extensively utilized in automotive assembly. Analyzing the fatigue strength of resistance spot welded (RSW) joints of thin plate high-strength steel holds significant ...
-
Article
Mechanical Performance Evaluation of Multi-Point Clinch–Adhesive Joints of Aluminum Alloy A5052-H34 and High-Strength Steel JSC780
The clinch–adhesive process, which combines mechanical clinching and adhesive bonding, is one of the most applied processes for joining aluminum alloy and steel in the manufacturing of vehicle bodies. In this ...
-
Article
Numerical modeling from process to residual stress induced in resistance spot welding of DP980 steel
DP980 is widely used in automotive bodies. In the present research, a numerical model was developed via the in-house finite element (FE) code JWRIAN-RSW for the multi-physics coupled process of resistance spot...
-
Article
In Situ DIC Study on LCF Behavior of Retired Weld Joint Subjected to Prolonged Service at Elevated Temperature
By using digital image correlation (DIC), low-cycle fatigue (LCF) behavior of CrMoV weld joint taken from a retired gas turbine rotor after 15-year service was investigated at 500 °C and 540 °C. The most remar...
-
Article
A position-adjustable universal backing plate to improve geometric accuracy in incremental sheet forming
A conventional backing plate (C-backing plate) in incremental sheet forming (ISF) may cause a large bending deviation and poor geometric accuracy owing to the large gaps between the inner edges of the backing ...
-
Article
Multi-step toolpath approach of improving the dimensional accuracy of a non-axisymmetric part in incremental sheet forming and its mechanism analysis
Incremental sheet forming (ISF) is a die-less manufacturing technology suitable for small lot and/or customized parts. However, geometric accuracy issues in ISF with a single-step toolpath and a conventional m...
-
Article
Development of die-less single-tool multi-point plate forming technology for 3D curved shape
To avoid degradation of material properties, high equipment investment, low efficiency, and potential safety issues caused by conventional technologies like line heating, multi-point plate forming, and explosi...
-
Article
Open AccessCorrection to: Efficient analysis of welding thermal conduction using the Newton–Raphson method, implicit method, and their combination
A Correction to this paper has been published: https://doi.org/10.1007/s00170-020-06437-w
-
Article
Open AccessEfficient analysis of welding thermal conduction using the Newton–Raphson method, implicit method, and their combination
Finite element analysis is commonly used to investigate the thermal-mechanical phenomena during welding. To improve the computing efficiency of finite element analysis for welding thermal conduction, a novel N...
-
Article
Impact of Stack Orientation on Self-Piercing Riveted and Friction Self-Piercing Riveted Aluminum Alloy and Magnesium Alloy Joints
Self-piercing riveting (SPR) is a mature method to join dissimilar materials in vehicle body assembling. Friction self-piercing riveting (F-SPR) is a newly developed technology for joining low-ductility materi...
-
Article
Study on fracture toughness of 617 Ni-based alloy welded joint under different elevated temperatures
The fracture toughness of 617 Ni-based weld metal (WM) under different elevated temperatures was tested with a novel method and its fracture mechanism was investigated in this paper. It was found that the frac...
-
Article
Predicting Welding Residual Stress of a Multi-pass P92 Steel Butt-Welded Joint with Consideration of Phase Transformation and Tempering Effect
A three-dimensional finite element model based on thermal–metallurgical–mechanical coupling theory was developed to simulate temperature field, phase fraction and residual stress distribution of a multi-pass P...
-
Article
A dual-mesh method for efficient thermal stress analysis of large-scale welded structures
Transient thermo-mechanical analysis of welding problem requires tremendous computation cost. To accelerate the thermal analysis of large-scale welded structures, an efficient computation scheme based on heat ...
-
Article
Deformation characteristics and microstructural evolution in friction stir welding of thick 5083 aluminum alloy
The microstructure development in the weld key-hole along the plate thickness was investigated through scanning electron microscope (SEM), electron backscatter diffraction (EBSD), and transmission electron mic...
-
Article
In Situ SEM Observations of Fracture Behavior of Laser Welded–Brazed Al/Steel Dissimilar Joint
Laser welding–brazing of 6061-T6 aluminum alloy to DP590 dual-phase steel with Al-Si12 flux-cored filler wire was performed. The microstructure at the brazing interface was characterized. Fracture behavior was...
-
Article
Efficient Simulation of Welding Distortion in Large Structures and Its Reduction by Jig Constraints
Two large construction machinery structures were welded separately with and without jig constraints. The welding distortion of the entire structure was measured by a 3D coordinate measuring system and simulate...
