Blar i NTNU Open på forfatter "Welo, Torgeir"
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Fatigue crack growth behavior of SLM 316L stainless steel
Wold, Anders Bratli (Master thesis, 2017)Additive manufacturing (AM) has the ability to change the way we design and manufacture products. The technology enables the manufacture of complex parts in one process by adding layer-upon-layer of material, with practically ... -
Fatigue of additively manufactured 316L stainless steel: The influence of porosity and surface roughness
Solberg, Klas; Guan, Shuai; Javad Razavi, Seyed Mohammad; Welo, Torgeir; Chan, Kang Cheung; Berto, Filippo (Journal article; Peer reviewed, 2019)The fatigue behaviour of additively manufactured (AM) 316L stainless steel is investigated with the main emphasis on internal porosity and surface roughness. A transition between two cases of failure are found: failure ... -
Fatigue properties of AA6060-T6 butt welds made by hybrid metal extrusion & bonding
Sandnes, Lise; Grong, Øystein; Welo, Torgeir; Berto, Filippo (Peer reviewed; Journal article, 2020)The present investigation is concerned with high‐cycle axial fatigue testing of a 2‐mm AA6060‐T6 hybrid metal extrusion & bonding (HYB) butt weld produced in the solid state using AA6082 filler metal addition. The results ... -
Fatigue Strength Assessment of Steel Rollers: On the Reliability of the Strain Energy Density Approach on Real Components
Chebat, F.; Peron, Mirco; Viespoli, Luigi Mario; Welo, Torgeir; Berto, Filippo (Journal article; Peer reviewed, 2018)Welded joints are one of the most widely applied methods to join different steel components. However, they introduce stress concentrators that are commonly known to reduce the fatigue strength of structures. Several methods ... -
FE-simulering av strekkbøying av aluminiumsprofiler
Engum, Hans Eikeland (Master thesis, 2014)En utfordring ved strekkbøying for industrien er å oppnå tilstrekkelig høy dimensjonsnøyaktighet på formede aluminiumsprofiler. Det er viktig å ha god kjennskap til formingsprosessen underveis for å kunne gjenskape stabile ... -
A feasibility study of continuous grain refinement of sheet metal
Ha, Taekwang; Murudkar, Rahul; Hartwig, Karl; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen (Peer reviewed; Journal article, 2020)Various severe plastic deformation (SPD) techniques have been used to develop ultrafine-grained (UFG) materials to enhance material properties. Equal channel angular extrusion/pressing (ECAE/ECAP) is an effective technique ... -
First demonstration of a new additive manufacturing process based on metal extrusion and solid-state bonding
Blindheim, Jørgen; Welo, Torgeir; Steinert, Martin (Journal article; Peer reviewed, 2019)In this paper, a new additive manufacturing (AM) process based on extrusion and solid-state bonding is presented. The process uses metal feedstock wire which is processed in a continuous rotary extruder in order to disperse ... -
Flexible 3D Stretch Bending of Aluminium Alloy Profiles: An Experimental and Numerical Study
Welo, Torgeir; Ma, Jun; Blindheim, Jørgen; Ha, Taekwang; Ringen, Geir (Peer reviewed; Journal article, 2020)Three-dimensionally (3D) shaped extrusions are attracting increased attention in order to meet the ever-growing demands on weight reduction to obtain lower emissions in the automobile industry. With the current transformation ... -
Formation of fully equiaxed grain microstructure in additively manufactured AlCoCrFeNiTi0.5 high entropy alloy
Guan, Shuai; Solberg, Klas; Wan, Di; Berto, Filippo; Welo, Torgeir; YUE, TM; Chan, KC (Journal article; Peer reviewed, 2019)In this work, the non-equiatomic high entropy alloy AlCoCrFeNiTi0.5 was additively manufactured via the laser engineered net shaping (LENS™) process. Contrary to the columnar grain microstructure commonly observed in ... -
How Norwegian Manufacturing Companies Deal with Innovation in Product Development Projects Using Qualitative Data Gathering Methods
Juliá Almenar, Francisco Javier (Master thesis, 2019)Some research on innovation, complexity and newness can be found in the literature, although most of this research focuses on industries related to large construction projects or development of new products. But how do ... -
Hybrid Metal Extrusion & Bonding (HYB) - a new technology for solid-state additive manufacturing of aluminium components
Blindheim, Jørgen; Grong, Øystein; Aakenes, Ulf Roar; Welo, Torgeir; Steinert, Martin (Journal article; Peer reviewed, 2018)This paper demonstrates a concept for a new additive manufacturing process for aluminium alloys, based on the Hybrid Metal Extrusion & Bonding (HYB) technology, along with the potential for further development of the ... -
The impact of thermo-mechanical processing routes on product quality in integrated aluminium tube bending process
Ma, Jun; Welo, Torgeir; Wan, Di (Peer reviewed; Journal article, 2021)This study was conducted to provide a better understanding of the role of electric field strength in the production of aftereffects in resting state scalp electroencephalography by repetitive transcranial magnetic stimulation ... -
Improving Friction Drilling and Joining through Controlled Material Flow
Su, Kuan-Yu; Welo, Torgeir; Wang, Jyhwen (Journal article; Peer reviewed, 2018)Friction drilling is a novel hole-making process that can be performed on thin-walled sheet metals. The friction between a rapid-rotating conical tool and a sheet metal workpiece generates heat to soften and displace the ... -
In-line Springback Measurement for Tube Bending Using a Laser System
Ha, Taekwang; Ma, Jun; Blindheim, Jørgen; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen (Peer reviewed; Journal article, 2020)Tube bending process is extensively used for many industrial fields such as the automotive, shipbuilding, and aircraft manufacturing industries. However, one limitation of the tube bending process is that it is not easy ... -
In-Process Monitoring of Springback in Industrial Bending Using a Laser Sensor-Based Method
He, Xu; Ma, Jun; Tronvoll, Sigmund Arntsønn; Welo, Torgeir (Peer reviewed; Journal article, 2022)Bent tubes and profiles are widely used in many industries such as automotive, aerospace and shipbuilding. In bending of tubes and profiles, springback is normally regarded as a challenge, affecting the dimensional accuracy ... -
Industry-Academia Collaboration in Research and Innovation Projects. A Knowledge Management Perspective
Hansen, Irina-Emily (Doctoral theses at NTNU;2021:418, Doctoral thesis, 2021)Industry-academia research and innovation projects often fail to transform research results into successful outcomes in industrial settings. This thesis concerns the understanding of lack of transparency—the gap, or ... -
Influence of deformation prior to ageing on fatigue behavior of extruded AA6082-T6 profiles
Wang, Xintong; Ma, Jun; Welo, Torgeir (Peer reviewed; Journal article, 2022)This paper investigates the effect of plastic deformation before artificial ageing on fatigue behavior of extruded AA6082-T6 profiles. As-received, T4-temper materials are pre-deformed at different strains and followed by ... -
Influence of innovation, complexity and newness on success in new product development projects: a survey in Norwegian manufacturing industry
Beste, Carina; Welo, Torgeir; Olsson, Nils (Peer reviewed; Journal article, 2020)There is little tolerance for deviation in time, budget and quality in the execution of product development projects. On the other hand, the project environment is gaining complexity. Changes on project scope are daily ... -
Integrating Closed-Loop Supply Chain Design-Planning into Product Development: A Systematic Literature Review
Mostafayi Darmian, Sobhan; Sgarbossa, Fabio; Welo, Torgeir (Chapter, 2023)Supply chain design and planning during product development (PD) are crucial for successful supply chain management. Despite its importance, there exists a significant gap in the literature regarding the structure required ... -
Investigating Organizational Knowledge Transformation Capabilities in Integrated Manufacturing and Product Development Companies
Welo, Torgeir; Ringen, Geir (Journal article; Peer reviewed, 2018)In today’s fierce economic climate, many product manufacturing firms recognize that their knowledge process with regards to product realization becomes an increasingly important factor. However, it is challenging task for ...