Fredrik Sikström

A Novel Depth-Connected Region-Based Convolutional Neural Network for Small Defect Detection in Additive Manufacturing

Yiming Wang, Zidong Wang, Weibo Liu, Nianyin Zeng, Stanislao Lauria, Camilo Prieto, Fredrik Sikström, Hui Yu, Xiaohui Liu

2025

In-situ Imaging for Temperature Estimation in Laser Directed Energy Deposition with Wire Feedstock Using a Convolutional Neural Network

Atieh Sahraeidolatkhaneh, Morgan Nilsen, Amit Kumar Mishra, Fredrik Sikström

2024

A New Particle Swarm Optimization Algorithm for Outlier Detection : Industrial Data Clustering inWire Arc Additive Manufacturing

Jingzhong Fang, Zidong Wang, Weibo Liu, Stanislao Lauria, Nianyin Zeng, Camilo Prieto, Fredrik Sikström, Xiaohui Liu

2024

Beam shaping with a deformable mirror for gap bridging in autogenous laser butt welding

Yongcui Mi, Pasquale Guglielmi, Morgan Nilsen, Fredrik Sikström, Gianfranco Palumbo, Antonio Ancona

2023

Influence of laser-wire interaction on heat and metal transfer in directed energy deposition

Seyyed Mohammad Ali Noori Rahim Abadi, Yongcui Mi, Agnieszka Kisielewicz, Fredrik Sikström, Isabelle Choquet

2023

Comparative study of the main electromagnetic models applied to melt pool prediction with gas metal arc : Effect on flow, ripples from drop impact, and geometry

Pradip Aryal, Fredrik Sikström, H. Nilsson, Isabelle Choquet

2022

Conduction mode laser welding with beam shaping using a deformable mirror

Yongcui Mi, Satyapal Mahade, Fredrik Sikström, Isabelle Choquet, Shrikant V. Joshi, Antonio Ancona

2022

Modelling of beam energy absorbed locally in conduction mode laser metal fusion

Seyyed Mohammad Ali Noori Rahim Abadi, Yongcui Mi, Fredrik Sikström, Isabelle Choquet

2021

Hot-Wire Laser-Directed Energy Deposition : Process Characteristics and Benefits of Resistive Pre-Heating of the Feedstock Wire

Agnieszka Kisielewicz, Karthikeyan Thalavai Pandian, Daniel Sthen, Petter Hagqvist, María Asunción Valiente Bermejo, Fredrik Sikström, Antonio Ancona

2021

Fredrik Sikström

Organization

Research area

Integrated vision-based seam tracking system for robotic laser welding of curved closed square butt joints

Improving laser directed energy deposition with wire feed-stock through beam shaping with a deformable mirror

Deep Learning for Joint Gap Width Classification and Tack Weld Detection in Laser Beam Welding

Multi sensor monitoring of the wire-melt pool interaction inhot-wire directed energy deposition using laser beam

Monitoring and control of directed energy deposition using a laser beam

CFD-Based Feasibility Study of Laser-Directed Energy Deposition With a Metal Wire for On-Orbit Manufacturing

Beam Offset Detection in Laser Stake Welding of Tee Joints Using Machine Learning and Spectrometer Measurements

Effect of Substrate Orientation on Melt Pool during Multi-Layer Deposition in V-Groove with Gas Metal Arc

Effect of shaped laser beam profiles on melt flow dynamics in conduction mode welding

Influence of Laser Beam Shaping on Melt Pool Thermocapillary Flow

Beam offset detection in laser stake welding of tee joints based on photodetector sensing

Adaptive control of the filler wire rate during laser beam welding of squared butt joints with varying gap width

In-process Monitoring and Control of Robotized Laser Beam Welding of Closed Square Butt Joints

Monitoring of Varying Joint Gap Width During Laser Beam Welding by a Dual Vision and Spectroscopic Sensing System

Barriers for industrial implementation of in-process monitoring of weld penetration for quality control

Evaluation of non-contact methods for joint tracking in a laser beam welding application

Monitoring of laser beam welding by a non-intrusive optical sensor system using photodiodes

Optical Methods for In-Process Monitoring of Laser Beam Welding

Emissivity compensated spectral pyrometry for varying emissivity metallic measurands

Heat input and temperatures in welding

Modeling and simulation for welding automation

Role of fixture forces on distortion in gas tungsten arc welding : An experimental and modelling approach

Integration of finite element analysis and computer aided robotics for advanced programming of robotized welding

Optimering av effektreglering till kedjeslipverk vid Wargöns bruk

Simulated Feedback Control of Metal Fusion Welding

A Novel Depth-Connected Region-Based Convolutional Neural Network for Small Defect Detection in Additive Manufacturing

In-situ Imaging for Temperature Estimation in Laser Directed Energy Deposition with Wire Feedstock Using a Convolutional Neural Network

A New Particle Swarm Optimization Algorithm for Outlier Detection : Industrial Data Clustering inWire Arc Additive Manufacturing

Beam shaping with a deformable mirror for gap bridging in autogenous laser butt welding

Influence of laser-wire interaction on heat and metal transfer in directed energy deposition

Comparative study of the main electromagnetic models applied to melt pool prediction with gas metal arc : Effect on flow, ripples from drop impact, and geometry

Conduction mode laser welding with beam shaping using a deformable mirror

Modelling of beam energy absorbed locally in conduction mode laser metal fusion

Hot-Wire Laser-Directed Energy Deposition : Process Characteristics and Benefits of Resistive Pre-Heating of the Feedstock Wire

In-process spectroscopic detection of chromium loss during Directed Energy Deposition of alloy 718

A study on change point detection methods applied to beam offset detection in laser welding

Robust vision-based joint tracking for laser welding of curved closed-square-butt joints

Detecting beam offsets in laser welding of closed-square-butt joints by wavelet analysis of an optical process signal

Prediction of penetration in one-sided fillet welds by in-process joint gap monitoring : an experimental study

Joint tracking in zero gap laser beam welding using a vision sensor

Operator bias in the estimation of arc efficiency in gas tungsten arc welding

Model based feedback control of gas tungsten arc welding : An experimental study

Emissivity compensated spectral pyrometry-algorithm and sensitivity analysis

Operator influence on the estimation of arc efficiency in gas tungsten arc welding

Emissivity estimation for high temperature radiation pyrometry on Ti–6Al–4V

Model order reduction methods applied to a welding model

Simulation-based feedback control of welding processes

3D-Scanning for Weld Distortion Measuring

Modelling and Simulation for Feedback Control of Welding

Simulation for Design of Automated Welding

Research projects