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Lars-Erik Svensson

Professor

senior

Staff member at Division of Welding Technology.

Conducts research in engineering and technology, production technology.


Read more about my research on our Swedish website.


Publications


A contribution to the study of negative polarity in GMA welding

Published

A contribution to the study of negative polarity in GMA welding

GMAW using the electrode with negative polarity (DCEN) has been frequently suggested as a potential means of increasing production capacity. The...

A critical analysis of weld heat input measurement through a water-cooled stationary anode calorimeter

Published

A critical analysis of weld heat input measurement through a water-cooled stationary anode calorimeter

A comprehensive model on heat transfer in welded plates is able to calculate the amount of heat losses from the surfaces. A model demands as input...

A critical analysis of weld heat input measurement through a water-cooled stationary anode calorimeter

Published

A critical analysis of weld heat input measurement through a water-cooled stationary anode calorimeter

Comprehensive models of heat transfer require specification of the total amount of heat received by the workpiece. The objective of this work was t...

Applicability of Low Transformation Temperature welding consumables to increase fatigue strength of welded high strength steels

Published

Applicability of Low Transformation Temperature welding consumables to increase fatigue strength of welded high strength steels

Application of Low Transformation Temperature (LTT) consumables in welding is a recent approach to increase the fatigue strength of welds. In this...

Characterization of cold lap defects in tandem arc MAG welding

Published

Characterization of cold lap defects in tandem arc MAG welding

The objective of this investigation was to classify and characterize the small lack of fusion defects, called cold lap, located at the weld toe....

Characterization of cold lap defects in tandem arc MAG welding

Published

Characterization of cold lap defects in tandem arc MAG welding

The objective of this investigation was to classify and characterize the small lack of fusion defects, called cold lap, located at the weld toe....

Cold laps - micro-lack of fusion defects in steel arc welds : a review

Published

Cold laps - micro-lack of fusion defects in steel arc welds : a review

Comparison of forming, welding and heat treatment simulations in LS-DYNA and MSC Marc

Published

Comparison of forming, welding and heat treatment simulations in LS-DYNA and MSC Marc

The manufacturing of components for aero engine structures from a flat sheet to the final shape usually requires several steps that may introduce...

Cooling Rates and Peak Temperatures during Friction Stir Welding of a High Carbon Steel

Published

Cooling Rates and Peak Temperatures during Friction Stir Welding of a High Carbon Steel

Friction stir welding can potentially avoid post weld heat treatment for the welding of high carbon steels. Although control of both peak temperatu...

Correlation between laser welding sequence and distortions for thin sheet structures

Published

Correlation between laser welding sequence and distortions for thin sheet structures

Thin ultra-high strength steel shaped as 700 mm long U-beams have been laser welded in overlap configuration to study the influence of welding...

Distortion Analysis in Laser Welding of Ultra High Strength Steel

Published

Distortion Analysis in Laser Welding of Ultra High Strength Steel

Due to increased demands on reduced weight in automotive industries, the use of ultra high strength steels (UHSS) has increased. When laser welding...

Economical Viability of Laser Metal Deposition

Published

Economical Viability of Laser Metal Deposition

Reports on large economic savings using Additive Manufacturing (AM) has been found in literature when exploiting the positive capabilities of AM....

Effect of Austenitization and Tempering on the Microstructure and Mechanical Properties of a 5 wt% Cr Cold Work Tool Steel

Published

Effect of Austenitization and Tempering on the Microstructure and Mechanical Properties of a 5 wt% Cr Cold Work Tool Steel

The effects of austenitization and tempering temperatures for a 5 wt% Cr cold work tool steel are studied with an aim of understanding the influenc...

Effect of crystal orientation and texture on fatigue crack evolution in high strength steel welds

Published

Effect of crystal orientation and texture on fatigue crack evolution in high strength steel welds

In the present study, electron backscattered diffraction is used to analyze the fatigue crack evolution in a high strength steel weld that was load...

Effect of HFMI treatment procedure on weld toe geometry and fatigue properties of high strength steel welds

Published

Effect of HFMI treatment procedure on weld toe geometry and fatigue properties of high strength steel welds

The effects of high frequency mechanical impact (HFMI) treatment procedure on the weld toe geometry and fatigue strength in 1300 MPa yield strength...

Effect of high frequency mechanical impact treatment on fatigue strength of welded 1300 MPa yield strength steel

Published

Effect of high frequency mechanical impact treatment on fatigue strength of welded 1300 MPa yield strength steel

High frequency mechanical impact (HFMI) is a recent post weld treatment method which can be employed to increase the fatigue strength of welded...

Effect of Laser Welding Parameters on Porosity of Weldsin Cast Magnesium Alloy AM50

Published

Effect of Laser Welding Parameters on Porosity of Weldsin Cast Magnesium Alloy AM50

Pores in the weld metal lower the mechanical properties of the weld. It is therefore important to understand the pore formation mechanisms and find...

Effect of Process Parameters on the Crack Formation in Laser Metal Powder Deposition of Alloy 718

Published

Effect of Process Parameters on the Crack Formation in Laser Metal Powder Deposition of Alloy 718

Cracking in Alloy 718 using laser metal powder deposition has been evaluated in this study. It is found that the material is susceptible to crackin...

Effect of shielding gas on welding performance and properties of duplex and superduplex stainless steel welds

Published

Effect of shielding gas on welding performance and properties of duplex and superduplex stainless steel welds

The influence of shielding gases on welding performanceand on properties of duplex and superduplex stainlesssteel welds was studied. Using argon as...

Effect of welding position on properties of duplex and superduplex stainless steel circumferential welds

Published

Effect of welding position on properties of duplex and superduplex stainless steel circumferential welds

The influence of welding position on properties ofduplex and superduplex stainless steel welds was studied. Circumferential pipe welds were produce...

Effects of Austenitisation Temperature and Multiple Tempering on the Microstructure and Impact Toughness of a 5 wt. % Cr Cold Work Tool Steel

Published

Effects of Austenitisation Temperature and Multiple Tempering on the Microstructure and Impact Toughness of a 5 wt. % Cr Cold Work Tool Steel

The microstructure and properties of a 5 wt.% Cr cold work tool steel were studied after austenitisation at 1020°C, 1050°C or 1075°C followed by...

Efficient welding of high strength steel

Published

Efficient welding of high strength steel

 Producing welds with properties matching those of the steel is a challenge at high strength levels. The present study investigated how cooling rat...

Evaluation of a temperature measurement method developed for laser metal deposition

Published

Evaluation of a temperature measurement method developed for laser metal deposition

Measuring temperatures in the material during laser metal deposition (LMD) has an inherent challenge caused by the laser. When thermocouples are...

Evaluation of the effect of process parameters on microstructural characteristics in laser metal deposition of Alloy 718

Published

Evaluation of the effect of process parameters on microstructural characteristics in laser metal deposition of Alloy 718

Factors influencing fusion of spatter to the base metal during tandem GMAW

Published

Factors influencing fusion of spatter to the base metal during tandem GMAW

Tandem gas metal arc welding (tandem GMAW) is, as a high productivity welding method of manufacturing process, utilized broadly in modern Swedish...

Factors influencing fusion on spatter to the base metal during tandem GMAW welding

Published

Factors influencing fusion on spatter to the base metal during tandem GMAW welding

Heat input and temperatures in welding

Published

Heat input and temperatures in welding

A key feature in welding is the energy supplied, in order to join the work pieces together. For all fusion welding methods, the supplied energy is ...

Improving fatigue strength of welded 1300 MPa yield strength steel using HFMI treatment or LTT fillers

Published

Improving fatigue strength of welded 1300 MPa yield strength steel using HFMI treatment or LTT fillers

Fatigue improvement techniques are widely used to increase fatigue strength of welded high strength steels. In this paper high frequency mechanical...

Increasing fatigue life using Low Transformation Temperature (LTT) welding consumables,

Published

Increasing fatigue life using Low Transformation Temperature (LTT) welding consumables,

Influence of dilution on properties of high strength steel weld metals

Published

Influence of dilution on properties of high strength steel weld metals

Influence of Heat Input on Grain Structure in Thin-Wall Deposits using Laser Metal Powder Deposition

Published

Influence of Heat Input on Grain Structure in Thin-Wall Deposits using Laser Metal Powder Deposition

Laser metal deposition (LMD) is an additive manufacturing method which is used to deposit material directly onto a metal surface layer upon layer...

Influence of laser exposure time and point distance on 75-μm-thick layer of selective laser melted Alloy 718

Published

Influence of laser exposure time and point distance on 75-μm-thick layer of selective laser melted Alloy 718

A systematic matrix with 25 samples, using five different point distances and five laser exposure times, depositing 75-μm-thick layers of Alloy 718...

Influence of oxides on cold lap formation in tandem GMAW

Published

Influence of oxides on cold lap formation in tandem GMAW

The connection between the formation of cold laps and the presence of Mn‐Si oxides was studied. The underlying purpose is to understand the...

Influence of preheating temperature on cold lap formation in tandem GMAW

Published

Influence of preheating temperature on cold lap formation in tandem GMAW

A cold lap is defined as a type of micro-lack of fusion in ISO standard (ISO 6520-1:2007) and have been found to influence fatigue properties of...

Influenza del gas di protezione sul comportamento e le proprietà  di giunti sa dati di acciai duplex e superduplex : Effect of shielding gas on welding performance and properties of duplex and superduplex stainless steel welds

Published

Influenza del gas di protezione sul comportamento e le proprietà  di giunti sa dati di acciai duplex e superduplex : Effect of shielding gas on welding performance and properties of duplex and superduplex stainless steel welds

The influence of shielding gases on welding performance and on properties of duplex and superduplex stainless steel welds was studied. Using argon ...

Investigation of laser metal deposited Alloy 718 onto an EN 1.4401 stainless steel substrate

Published

Investigation of laser metal deposited Alloy 718 onto an EN 1.4401 stainless steel substrate

This paper focuses on how process parameters affect the deposition of Alloy 718 onto an EN 1.4401 stainless steel substrate in terms of secondary...

Low Porosity in Cast Magnesium Welds by Advanced Laser Twin-Spot Welding

Published

Low Porosity in Cast Magnesium Welds by Advanced Laser Twin-Spot Welding

Porosity is reported to be a major issue when welding cast magnesium. Therefore, it is important to understand the pore formation mechanisms and fi...

Metallurgical effects and distortions in laser welding of thin sheet steels with variations in strength

Published

Metallurgical effects and distortions in laser welding of thin sheet steels with variations in strength

Geometrical distortions occur while welding, but the understanding of how and why they occur and how to control them is limited. The relation betwe...

Microstructural Characterization of Laser Metal Powder Deposited Alloy 718

Published

Microstructural Characterization of Laser Metal Powder Deposited Alloy 718

A microstructural study of Laser Metal Powder Deposition (LMPD) of Alloy 718, using a low (40 J/mm) and high (100 J/mm) heat inputs (HIs) was...

Microstructure of Selective Laser Melted Alloy 718 in As-Manufactured and Post Heat Treated Condition

Published

Microstructure of Selective Laser Melted Alloy 718 in As-Manufactured and Post Heat Treated Condition

Manufacturing of Alloy 718 with selective laser melting (SLM) process faces several challenges. One of the challenges is the process-induced...

Monitoring Thermal Cycles in Multi-pass Welding

Published

Monitoring Thermal Cycles in Multi-pass Welding

Differently from any previous investigation in welding, this research work presents a novel development that allows temperature to be measured and...

Neutron Diffraction Evaluation of Near Surface Residual Stresses at Welds in 1300 MPa Yield Strength Steel

Published

Neutron Diffraction Evaluation of Near Surface Residual Stresses at Welds in 1300 MPa Yield Strength Steel

Evaluation of residual stress in the weld toe region is of critical importance. In this paper, the residual stress distribution both near the surfa...

Non-destructive measurement of weld toe radius using Weld Impression Analysis, Laser Scanning Profiling and Structured Light Projection methods

Published

Non-destructive measurement of weld toe radius using Weld Impression Analysis, Laser Scanning Profiling and Structured Light Projection methods

Optimising Quality and Productivity in Welding of Duplex and Superduplex Stainless Steels

Published

Optimising Quality and Productivity in Welding of Duplex and Superduplex Stainless Steels

The aim of this work was to study the influence of shielding gases and welding positions on properties of duplex and superduplex stainless steel...

Retained Austenite Transformation during Heat Treatment of a 5 Wt Pct Cr Cold Work Tool Steel

Published

Retained Austenite Transformation during Heat Treatment of a 5 Wt Pct Cr Cold Work Tool Steel

Retained austenite transformation was studied for a 5 wt pct Cr cold work tool steel tempered at 798 K and 873 K (525 degrees C and 600 degrees C)...

Retained austenite transformation during heat treatment of a 5wt.% Cr cold work tool steel

Published

Retained austenite transformation during heat treatment of a 5wt.% Cr cold work tool steel

Review of Laser Deposited Superalloys Using Powder as an Additive

Published

Review of Laser Deposited Superalloys Using Powder as an Additive

Selection of Evaluation Methods for New Weld Demands: Pitfalls and Possible Solutions

Published

Selection of Evaluation Methods for New Weld Demands: Pitfalls and Possible Solutions

New demands often create a need for new evaluation methods. However, there are several pitfalls when choosing those methods that can endanger the...

Simulation and validation of forming, edge milling, welding and heat treatment of an alloy 718 component

Published

Simulation and validation of forming, edge milling, welding and heat treatment of an alloy 718 component

This paper describes finite element simulations of a manufacturing process chain consisting of forming, weld preparation by milling, laser welding...

Simulation and Validation of Forming, Milling, Welding and Heat Treatmentof an Alloy 718 Component

Published

Simulation and Validation of Forming, Milling, Welding and Heat Treatmentof an Alloy 718 Component

This paper describes finite element simulations of a manufacturing process chain consisting of forming, weld preparation by milling, laser welding...

Research projects