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Lars-Erik Svensson

Professor

senior

Anställd på Avdelningen för svetsteknologi.

Forskar inom området teknik, produktionsteknik.


Forskningsområde/forskningsintresse

Det huvudsakliga intresset ligger inom inverkan av svetsning och andra fogningsmetoder på materialets struktur och dess egenskaper.

Undervisning/handledning

Undervisar bland annat i kursen "Svetsteknologi" på Högskolan Väst.

Nyckelord

Svetsteknologi, fogningsmetoder, verktygsstål.


Publikationer


A contribution to the study of negative polarity in GMA welding

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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...

Microstructural Characterization of Laser Metal Powder Deposited Alloy 718

Publicerat

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...

Varestraint weldability testing of additive manufactured alloy 718

Publicerat

Varestraint weldability testing of additive manufactured alloy 718

The weldability in terms of susceptibility towards hot cracking of selective laser melted (SLM) Alloy 718 was investigated and wrought Alloy 718 wa...

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

Publicerat

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...

Correlation between laser welding sequence and distortions for thin sheet structures

Publicerat

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...

Evaluation of a temperature measurement method developed for laser metal deposition

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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)...

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

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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

Publicerat

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

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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 ...

Monitoring Thermal Cycles in Multi-pass Welding

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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...

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

Publicerat

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

Publicerat

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

Publicerat

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...

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

Publicerat

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

Strength and Impact Toughness of High Strength Steel Weld Metals : Influence of Welding Method, Dilution and Cooling Rate

Publicerat

Strength and Impact Toughness of High Strength Steel Weld Metals : Influence of Welding Method, Dilution and Cooling Rate

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

The relative effects of residual stresses and weld toe geometry on fatigue life of weldments

Publicerat

The relative effects of residual stresses and weld toe geometry on fatigue life of weldments

The weld toe is one of the most probable fatigue crack initiation sites in welded components. In this paper, the relative influences of residual...

Towards a Map of Solidification Cracking Risk in Laser Welding of Austenitic Stainless Steels

Publicerat

Towards a Map of Solidification Cracking Risk in Laser Welding of Austenitic Stainless Steels

In this work, two series of specimens with Hammar and Svensson's Cr- and Ni-equivalents (Creq+Nieq) = 35 and 45 wt% were used to cover a wide range...

Welding enabling light weight design of heavy vehicle chassis

Publicerat

Welding enabling light weight design of heavy vehicle chassis

Development of lightweight cars for saving fuel and reducing emission has been a priority for more than a decade. A similar trend is now seen for...

Distortion Analysis in Laser Welding of Ultra High Strength Steel

Publicerat

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

Publicerat

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....

Efficient welding of high strength steel

Publicerat

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...

Influence of dilution on properties of high strength steel weld metals

Publicerat

Influence of dilution on properties of high strength steel weld metals

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

Publicerat

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

Publicerat

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...

Review of Laser Deposited Superalloys Using Powder as an Additive

Publicerat

Review of Laser Deposited Superalloys Using Powder as an Additive

Study on temperature influence on lack of fusion formation in spatter/base metal interface

Publicerat

Study on temperature influence on lack of fusion formation in spatter/base metal interface

In the development of modern welded structures with longer life-time and/or higher load-carrying ability, fatigue properties are becoming more and...

The measurement of weld toe radius using three non-destructive techniques

Publicerat

The measurement of weld toe radius using three non-destructive techniques

The three non-destructive methods Weld Impression Analysis, Laser Scanning Profiling and Structured Light Projection were employed to measure...

Characterization of cold lap defects in tandem arc MAG welding

Publicerat

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....

Heat input and temperatures in welding

Publicerat

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 ...

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

Publicerat

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

Influence of preheating temperature on cold lap formation in tandem GMAW

Publicerat

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...

The right evaluation method - an enabler for process improvement

Publicerat

The right evaluation method - an enabler for process improvement

This paper aims at describing the procedure where an alternative evaluation process was developed to support the improvement of both welding and we...

Characterization of cold lap defects in tandem arc MAG welding

Publicerat

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....

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

Publicerat

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...

Influence of oxides on cold lap formation in tandem GMAW

Publicerat

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...

Forskningsprojekt


Laser metal deposition using powder as an additive - LMD-p

Light weight chassi through improved fatigue properties of welded truck components

This research project will develop recommendations on welding in high strength steel. This in turn will make new light weight design...

Welding of superalloys

This is a description of two research projects at University West concerning welding of superalloys.

Welding metallurgy and cracking in superalloys - Weldmecs

Welding of high strength steels

This is a presentation of several research projects run by University West where the aim is to investigate different aspects of welding o...

Fast and robust optical in-process monitoring for welding automation

Strengthening regional industry by building laboratories, Coldlabs