2020
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1. |
de Moraes Costa, André Luiz; da Silva, Uilian Souza; Valberg, Henry Sigvart. On the friction conditions in FEM simulations of cold extrusion. Procedia Manufacturing 2020 ;Volum 47. s. 231-236 NTNU
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2. |
Valberg, Henry Sigvart; Lefstad, Martin; de Moraes Costa, André Luiz. On the mechanism of formation of back-end defects in the extrusion process. Procedia Manufacturing 2020 ;Volum 47. s. 245-252 SINTEF
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2019
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3. |
Chamanfar, Ahmad; Valberg, Henry Sigvart; Templin, B; Plumeri, John E; Misiolek, Wojciech Z. Development and validation of a finite-element model for isothermal forging of a nickel-base superalloy. Materialia 2019 ;Volum 6. s. 1-17 NTNU
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4. |
Valberg, Henry Sigvart; Langøy, Morten Andre; Nedreberg, Mette; Helvig, Torgeir. The mechanics of the "eye"- Specimen bend test investigated by experiment and FE-analysis. AIP Conference Proceedings 2019 ;Volum 2113. UIS
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5. |
Valberg, Henry Sigvart; Lefstad, Martin; Costa, André L. M.. The hot spot in Al-rod extrusion investigated by FEM-analysis. AIP Conference Proceedings 2019 ;Volum 2113. SINTEF
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2018
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6. |
Costa, André L. M.; Riffel, Douglas B; Misiolek, Wojciech Z; Valberg, Henry Sigvart. A FEM simulation study of the solid state hydrostatic extrusion of PMMA. AIP Conference Proceedings 2018 ;Volum 1960.(1) NTNU
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7. |
Valberg, Henry Sigvart; Costa, André L. M.. Metal flow and temperature in direct extrusion of large-size aluminum billets. AIP Conference Proceedings 2018 ;Volum 1960. NTNU
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8. |
Wirti, Pedro H B; Costa, André L. M.; Misiolek, Wojciech Z; Valberg, Henry Sigvart. Experimental study and FEM simulation of the simple shear test of cylindrical rods. AIP Conference Proceedings 2018 ;Volum 1960. NTNU
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2017
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9. |
Rajendran, N.; Valberg, Henry Sigvart; Misiolek, W. Z.. The FEM simulation of continuous rotary extrusion (CRE) of aluminum alloy AA3003. AIP Conference Proceedings 2017 ;Volum 1896. s. - NTNU
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10. |
Valberg, Henry Sigvart; Costa, André L. M.. Shear zone formation within the billet and metal flow through the die orifice in unlubricated axisymmetric forward and backward extrusion. AIP Conference Proceedings 2017 ;Volum 1896. s. - NTNU
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11. |
Valberg, Henry Sigvart; Langøy, Morten Andre; Nedreberg, Mette; Helvig, Torgeir. Deducing material quality in cast and hot-forged steels by new bending test. AIP Conference Proceedings 2017 ;Volum 1896. s. - UIS NTNU
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2016
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12. |
Valberg, Henry Sigvart; Costa, A. L. M.; Misiolek, W. Z.. Scale Effect in FEM Simulation of Axisymmetric Hot Micro-Extrusion of Aluminum Alloys. ASME 2016 International Mechanical Engineering Congress and Exposition, IMECE16; 2016-11-11 - 2016-11-27 NTNU
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13. |
Valberg, Henry Sigvart; Khorasani, S.T.; Nolte, D.; Misiolek, W. Z.. Prediction of Thermal Conditions in Rod Extrusion by FEM-Analysis for Laboratory and Industrial Aluminum Extrusion. 11th International Aluminum Extraction Technology Seminar; 2016-05-02 - 2016-05-06 NTNU
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14. |
Valberg, Henry Sigvart; Khorasani, S.T.; Nolte, D.; Misiolek, W. Z.. Required Extrusion Loads in Axisymmetric Rod Extrusion Characterized by FEM Analysis with Experiments. 11th International Aluminum Extraction Technology Seminar; 2016-05-02 - 2016-05-06 NTNU
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2015
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15. |
Valberg, Henry Sigvart; Langøy, Morten Andre; Nedreberg, Mette. Mechanical properties in hot forged steel parts in relation to properties in corresponding parts made by casting solely. Key Engineering Materials 2015 ;Volum 651-653. s. 284-290 NTNU UIS
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16. |
Valberg, Henry Sigvart; Torabzadeh Khorasani, Sepinood; Nolte, Dirk. Comparison of the thermo-mechanical conditions in an industrial sized hot aluminium extrusion process in relation to those in corresponding small sized laboratory processes. Key Engineering Materials 2015 ;Volum 651-653. s. 1577-1584 NTNU SINTEF
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2014
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17. |
Torabzadeh Khorasani, Sepinood; Valberg, Henry Sigvart. On the velocity and the strain rate field in unlubricated direct and indirect axisymmetric extrusion of Al. Key Engineering Materials 2014 ;Volum 611-612. s. 1013-1020 NTNU
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18. |
Valberg, Henry Sigvart; Nolte, Dirk Christian; Khan, Yawar Abbas. Metal flow conditions in porthole channels of different size. Key Engineering Materials 2014 ;Volum 611-612. s. 1005-1012 NTNU SINTEF
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19. |
Valberg, Henry Sigvart; Nolte, Dirk Christian; Khan, Yawar Abbas. On the Balance of the Metal Flow in Porthole Dies with Differently Sized Porthole Channels. Key Engineering Materials 2014 ;Volum 585. s. 77-84 NTNU
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2013
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20. |
Torabzadeh Khorasani, Sepinood; Valberg, Henry Sigvart. Velocity field in direct, indirect and friction assisted extrusion of Al. Key Engineering Materials 2013 ;Volum 554-557. s. 776-786 NTNU
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21. |
Valberg, Henry Sigvart; Nolte, Dirk Christian; Torabzadeh Khorasani, Sepinood. Deformations in idealized 2D extrusion welding. Key Engineering Materials 2013 ;Volum 554-557. s. 2507-2522 NTNU
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2012
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22. |
Kandis, Janis; Valberg, Henry Sigvart. Metal Flow in Two-Hole Extrusion of Al-Alloys Studied by FEA with Experiments. Key Engineering Materials 2012 ;Volum 504-506. s. 493-498 NTNU
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23. |
Khan, Yawar Abbas; Torabzadeh Khorasani, Sepinood; Valberg, Henry Sigvart. Analysis of Gas Pocket Formation during Extrusion of Al Hollow Profiles and Establishing an Extrusion Seam Weld Limit Diagram. Key Engineering Materials 2012 ;Volum 491. s. 197-204 NTNU
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24. |
Torabzadeh Khorasani, Sepinood; Valberg, Henry Sigvart. Comparison between FEM Simulations and Analytical Calculations of Required Force for Al Extrusion. Key Engineering Materials 2012 ;Volum 504-506. s. 511-516 NTNU
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25. |
Valberg, Henry Sigvart. Characterization of Metal Flow in Metals Processing by a Combined Approach using Advanced Experimental Grid Pattern Techniques Coupled with FE-analysis. 13th International Conference on Aluminum Alloys; 2012-06-03 - 2012-06-07 NTNU
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26. |
Valberg, Henry Sigvart; Khan, Yawar Abbas. Aluminium Extrusion Weld Formation and Metal Flow Analysis in Hollow Profile Extrusions of Different Section Thickness. Key Engineering Materials 2012 ;Volum 491. s. 105-112 NTNU
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27. |
Valberg, Henry Sigvart; Khan, Yawar Abbas. On the Fundamental Mechanism of Seam Welding in Extrusion of Aluminum Alloys. Key Engineering Materials 2012 ;Volum 504-506. s. 529-534 NTNU
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2011
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28. |
Kandis, Janis; Valberg, Henry Sigvart; Wenbin, Wu. On the Deformation Mechanism in Shearing with Concurrent Crack Growth over the Cut Section. AIP Conference Proceedings 2011 ;Volum 1353. s. 609-614 NTNU
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29. |
Kandis, Janis; Valberg, Henry Sigvart; Wu, Wenbin. On the Mechanics of the Shearing Process in Bar Shearing. AIP Conference Proceedings 2011 ;Volum 1353. s. 615-620 NTNU
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30. |
Khan, Yawar Abbas; Valberg, Henry Sigvart. Studies of Porthole Extrusion through Die with Different Sizes of Portholes. AIP Conference Proceedings 2011 ;Volum 1353. s. 473-478 NTNU
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31. |
Valberg, Henry Sigvart; Melkild, Tony Teoh; Kandis, Janis. Determinig the Weld Quality in Extrusion Welding. AIP Conference Proceedings 2011 ;Volum 1353. s. 461-466 NTNU
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2010
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32. |
Irgens, I.; Nolte, Dirk; Valberg, Henry Sigvart. Use of a shadowing tongue to reduce elastic die deflections. ESAFORM; 2010-04-07 - 2010-04-09 NTNU
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33. |
Kandis, Janis; Valberg, Henry Sigvart. Use of Axisymmetric Shearing as Technological Test Method to gather Flow Stress Data for Metals. AIP Conference Proceedings 2010 NTNU
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34. |
Kandis, Janis; Valberg, Henry Sigvart; Wu, Wenbin. Use Of Axisymmetric Shearing As Technological Test Method To Gather Flow Stress And Ductility Data For Metals. Advances in Materials and Processing Technologies; 2010-10-24 - 2010-10-27 NTNU
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35. |
Kandis, Janis; Wu, Wenbin; Valberg, Henry Sigvart. The Mechanics Of The Shearing Prosess Studied By FEM-Analysis With Experiments. Advances in Materials and Processing Tehnologies (AMPT); 2010-10-24 - 2010-10-27 NTNU
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36. |
Khan, Yawar Abbas; Valberg, Henry Sigvart. Formation of Seam and Charge Welds in 2D Extrusion Welding. Advances in Materials and Processing Technologies; 2010-10-24 - 2010-10-27 NTNU
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37. |
Khan, Yawar Abbas; Valberg, Henry Sigvart. Formation of Seam and Charge Welds in 2D Extrusion Welding. AIP Conference Proceedings 2010 ;Volum 1315. s. 513-518 NTNU
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38. |
Khan, Yawar Abbas; Valberg, Henry Sigvart. Metal flow in idealised a-symmetric 2D extrusion welding. ESAFORM; 2010-04-07 - 2010-04-09 NTNU
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39. |
Khan, Yawar Abbas; Valberg, Henry Sigvart; Jakobsen, Bjørn Ove Tomstad. Deformation conditions in the extrusion weld zone when using pointed and square ended bridge. ESAFORM; 2010-04-07 - 2010-04-09 NTNU
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40. |
Marimuthu, GS; Moe, Per Thomas; Salberg, Bjarne; Liu, J; Valberg, Henry Sigvart; Burnell-Gray, James S; Rudd, W.. WELDING PROCEDURE ESTABLISHMENT FOR TUBULAR JOINTS WELDED BY SINGLE STATION, SOLID STATE WELDING MACHINE. Journal of Pressure Vessel Technology 2010 s. 29-38 NTNU
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41. |
S.M, Ganesan; Moe, Per Thomas; P, Vinothkumar; Audestad, Jan Inge; Salberg, Bjarne; Valberg, Henry Sigvart; Solberg, Jan Ketil; Burnell-Gray, James S; Rudd, Wayne. ESTABLISHMENT OF HEAT TREATMENT CYCLES FOR FORGE WELDED API L80 TUBULAR JOINTS. International Journal of Material Forming 2010 ;Volum 3. Suppl. 1 s. 343-346 NTNU
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42. |
S.M, Ganesan; Moe, Per Thomas; Salberg, Bjarne; Liu, Junyan; Valberg, Henry Sigvart; Burnell-Gray, James S; Rudd, Wayne. WELDING PROCEDURE ESTABLISHMENT FOR TUBULAR JOINTS WELDED BY SINGLE STATION, SOLID STATE WELDING MACHINE. Proceedings of the ASME 2010 Pressure Vessels and Piping Conference (PVP 2010); 2010-07-18 - 2010-07-22 NTNU
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43. |
Valberg, Henry Sigvart. Analysis of metal flow of aluminium through long choked die channels. Key Engineering Materials 2010 ;Volum 424. s. 145-152 NTNU
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44. |
Valberg, Henry Sigvart. Applied metal forming : including FEM analysis. Cambridge University Press 2010 (ISBN 978-0-521-51823-9) 465 s. NTNU
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45. |
Valberg, Henry Sigvart. Comparison of metal flow in un-lubricated direct and indirect extrusion of Al-alloys. ESAFORM; 2010-04-07 - 2010-04-09 NTNU
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46. |
Valberg, Henry Sigvart. Understanding metal flow in aluminium extrusion by means of emptying diagrams. ESAFORM; 2010-04-07 - 2010-04-09 NTNU
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2009
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47. |
Khan, Yawar Abbas; Valberg, Henry Sigvart; Irgens, Ivar. Joining of metal streams in extrusion welding. International Journal of Material Forming 2009 ;Volum 2. Suppl. 1 s. 109-112 NTNU
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48. |
Marimuthu, Ganesan; Moe, Per Thomas; Salberg, Bjarne; Audestad, Jan Inge; Valberg, Henry Sigvart; Rudd, Wayne; Burnell-Gray, James S. Design of a small-scale hot forging test. International Journal of Material Forming 2009 ;Volum 2. Suppl. 1 s. 113-116 NTNU
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49. |
Marimuthu, Ganesan; Valberg, Henry Sigvart; Moe, Per Thomas; Burnell-Gray, James S. Material and Temperature dependent behaviour of single macro-asperity tip when crushed against flat platen. International Journal of Material Forming 2009 ;Volum 2. Suppl. 1 s. 247-250 NTNU
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2008
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50. |
Khan, Yawar Abbas; Marimuthu, Ganesan; Valberg, Henry Sigvart; Moe, Per Thomas; Hansen, Arnfinn Willa. Deformation conditions in conventional shearing dependent on geometrical parameters of tooling. 11th ESAFORM Conference on Material Forming; 2008-04-23 - 2008-04-25 NTNU
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