Magnus Hörnqvist Colliander

Senior researcher (docent), Microstructure Physics, Department of Physics

The development and improvement of experimental methods to study the micro-scale mechanics of materials in-situ have in recent years opened up new possibilities for generating more detailed knowledge and understanding of the underlying physical processes. The primary goal of the research is to understand the mechanisms behind deformation and fracture processes in structural materials, primarily for demanding high-temperature environments, to provide quantitative data regarding these processes and contribute to the development of multi-scale modelling approaches to describe the phenomena. This is achieved by:
• Developing and using methods for in-situ characterization of the micro-mechanics of both bulk materials and interfaces. The primary tools are micro-scale mechanical testing in electron microscopes and time-resolved synchrotron light and neutron scattering techniques.
• Coupling the results from these experiments to advanced modeling at all length scales from ab-initio to continuum through extensive collaboration with theoretical research groups, with the dual purpose of contributing to model development/validation and employment of models for an increased understanding of physical phenomena.

In-situ micro-mechanics of materials and interfaces


Micro-mechanical testing of single-grain cantilever manufacture by focussed ion beam milling from a Ni-base superalloy, and the resulting force-displacement data compared to a finite element simulation.

This research area is focussed on in-situ micro-mechanical testing of small-scale deformation and fracture, especially of interfaces such as grain or phase boundaries. We develop testing methods for studying these properties in-situ inside electron microscopes, and collaborate with research groups focussed on modelling and simulation at the corresponding length scales (typically through crystal plasticity/cohesive zone models of density functional theory/molecular dynamics). The challenge is to understand and predict the material properties on the micro-scale, in order to explain the macro-scale response of engineering materials.


Projects as main PI


Projects as collaborator

  • Atomistic multi-scale modelling of intergranular fracture in W (funded by the Swedish Research Council Starting Grant 2016-04162, main PI: Assoc. Prof. Per Olsson, Lund University)


In-situ neutron and synchrotron X-ray scattering

Small-angle neutron scattering (SANS) data obtained during in-situ ageing of Fe-Cr at 773 and 798 K, and the resulting early-stage kinetics of the spinodal decomposition process.

This research area is focussed on the development and application of experimental and numerical methods in order to understand the behaviour of advanced engineering materials during deformation, processing and service. In particular, we will focus on in-situ high temperature experiments at synchrotrons and neutron sources to follow intergranular strain development and phase transformations during process- or service-like conditions in materials such as superalloys, high-entropy alloys and cemented carbides. Method development activities involve e.g. ultra-high temperature furnaces for the engineering neutron diffractometer BEER at ESS, as well sample environment for in-situ nano-mechanical testing at MAX IV.


Projects as main or co-main PI
  • Self-consistent modelling for neutron scattering applications (funded by Chalmers Area of Advance Materials Science and MAXIV/ESS initiative, shared with Prof. Magnus Ekh at the Department of Applied Mechanics at Chalmers)
  • In-situ studies of microstructural evolution during processing and service of high-temperature materials (funded by the national graduate school for neutron science (SWEDNESS), which is funded by the Swedish Foundation for Strategic Research, SSF, through the grant GSn15-0008)
  • Ultra-high temperature mechanical testing at BEER (funded by the Swedish Research Council Neutron Scattering grant 2016-06945, cooperation with Linköping University, KTH Royal Institute of Technology and Nuclear Physics Institute, Prague).
  • Nano-mechanical testing at MAX IV (funded by Chalmers MAXIV/ESS initiative).

Projects as co-proposer

  • Multiscale modelling of plastic deformation of cemented carbides (funded by the Swedish Research Council project grant 2016-04342, main PI: Prof. Göran Wahnström at the Department of Physics at Chalmers).

We also take part in several informal collaborations focussed on in-situ or ex-situ neutron and synchrotron X-ray scattering (e.g. modelling and prediction of residual stresses in additive manufactured Ti-alloys together with Malmö University, Luleå University, University West and GKN Aerospace).


General physical/mechanical metallurgy

Stress-strain curves and strain hardening behaviour of Ni-base superalloy Haynes 282 after different heat treatments, and morphology of the grain boundary carbides responsible for the reduced ductility of the ST+A condition.

Projects as main PI


Projects as co-proposer

  • Degradation mechanisms of CVD coatings in metal machining (funded by the Swedish Foundation for Strategic Research and Sandvik Coromant through the Industrial PhD program, lead by Prof. Mats Halvarsson)
  • High temperature fatigue crack propagation in Nickel base superalloys (funded by the Swedish Energy Agency through TurboPower Phase II, lead by Linköping University, cooperation with GKN Aerospace and Siemens Inustrial Turbomachinery)
  • Heat treatment and properties of superalloy Haynes 282 (funded by VINNOVA through the 6th National Aviation and Aerospace Research Programme – NFFP6, lead by Prof. Christer Persson at the Department of Materials and Manufacturing Technology, Chalmers, cooperation with GKN Aerospace).


Other activities include a collaboration with University of Cassino and Southern Lazio on fundamentals of deformation structure evolution and dynamic recrystallization during high-strain rate deformation of OFHC copper, and studies of spinodal decomposition in collaboration in Fe-Cr with KTH Royal Institute of Technology, Stockholm.

This page contains a full list of publications, including conference presentations and publications not associated with Chalmers University of Technology.


Chen, Z., Hörnqvist Colliander, M., Sundell, G., Peng, R., Moverare, J., Zhou, J. and Johansson, S.: Nano-scale characterization of white layer in broached Inconel 718. Mater. Sci. Eng. A. 684 (2017) 373-384.

Joseph, C., Persson, C. and Hörnqvist Colliander, M.: Influence of heat treatments on the microstructure and tensile properties of Ni-base superalloy Haynes 282. Mat. Sci. Eng. A 679 (2017) 520-530.

Xu, X., Odqvist, J.,
Hörnqvist Colliander, M., Thuvander, M., Steuwer, A., J.E. Westraadt, King, S. and Hedström, P.: Structural characterization of phase separation in FeCr: a current comparison of experimental methods. Metall. Mater. Trans. 47A (2016) 5549-5952.

Joseph, C.,
Hörnqvist Colliander, M. and Persson, C.: Influence of carbide distribution on ductility of Haynes 282 forgings. 13th International Symposium of Superalloys, Seven Springs (2016).

Mortazavi, N., Bonora, N., Ruggiero, A. and
Hörnqvist Colliander, M.: Dynamic recrystallization during high-strain-rate tension of copper. Met. Mat. Trans. A 47 (2016) pp. 2555-2559.

Johansson, J., Persson, C., Lai, H. and
Hörnqvist Colliander, M.: Microstructural examination of shear localisation during high-strain-rate deformation of Alloy 718. Mater. Sci. Eng. A 662 (2016) pp. 363-372.

Saarimäki, J., Moverare, J.J. and
Hörnqvist Colliander, M.: Time- and cycle-dependent crack propagation in Haynes 282. Mat. Sci. Eng. A. A658 (2016) pp. 463-471.

Hörnqvist Colliander, M
., Mortazavi, N., Bonora, N., and Ruggiero, A.: Dynamic recrystallization during dynamic tensile extrusion of copper - nucleation mechanisms and grain growth simulations. 6th International Conference on Recrystallization and Grain Growth, Pittsburgh (2016).

Iyer, A.H.S., Hörnqvist Colliander, M. and Stiller, K.: Crack growth studies in Nickel Superalloys. Solid State Phenomena 528 (2016) 237.240..

Krupp, U., Wackermann, K., Christ, H.J.,
Hörnqvist Colliander, M. and Stiller, K.: Intergranular oxidation effects during dwell-time fatigue of high-strength superalloys. 9th International Symposium on High-Temperature Corrosion and Protection of Materials (HTCPM), Les Embiez (2016).


Lundback, A., Pederson, R., Hörnqvist, M., Brice, C., Steuwer, A., Heralic, A., Buslaps, T. and Lindgren, L.-E.: Modeling and Experimental Measurement with Synchrotron Radiation of Residual Stresses in Laser Metal Deposited Ti-6Al-4V. 13th World Conference on Titanium, San Diego (2015).

Lundback, A., Pederson, R., Hörnqvist, M., Brice, C., Steuwer, A., Heralic, A., Buslaps, T. and Lindgren, L.-E.: Modeling and Simulation of metal deposition on a Ti-6Al-4V plate. National Congress on Computational Machanics, San Diego (2015).

Brommesson, R., Ekh, M. and Hörnqvist, M.: Correlation between crack length and load drop for low-cycle fatigue crack growth in Ti-6242. Accepted for publication in Int. J. Fatigue 81 (2015) pp. 1-9.

Bonora, N., Testa, G., Ruggiero, A., Iannitti, G., Mortazavi, N., and Hörnqvist Colliander, M.: Validating material modelling for OFHC copper using dynamic tensile extrusion (DTE) test at dierent velocity impact. 19th Biennial APS Conference on Shock Compression of Condensed Matter, Tampa (2015).

Ruggiero, A., Testa, G., Bonora, N., Iannitti, G., Persechino, I. and Hörnqvist Colliander, M.: Deformation and Failure of OFHC Copper under high strain rate shear compression. 19th Biennial APS Conference on Shock Compression of Condensed Matter, Tampa (2015).

Testa, N., Bonora, N., Ruggiero, A., Iannitti, G., Mortazavi, N. and Hörnqvist Colliander, M.: Modelling and simulation of dynamic recrystallization (DRX) in OFHC copper at very high strain Rates. 19th Biennial APS Conference on Shock Compression of Condensed Matter, Tampa (2015).

Bonora, N., Testa, G., Ruggiero, A., Iannitti, G., Mortazavi, N. and Hörnqvist, M.: Numerical simulation of dynamic tensile extrusion of OFHC copper. Int. J. Dynamic. Behav. Mater. 1 (2015) pp. 136-152.

Xu, X., Odqvist, J., Hörnqvist, M., Thuvander, M., Steuwer, A. and Hedström, P.: Phase Separation in Fe-Cr Alloys Studied by Small Angle Neutron Scattering. TMS Annual Meeting and Exibition, Orlando (2015).

Bonora, N., Ruggiero, A., Dichiaro, S., Testa, G., Hörnqvist, M., Mortasavi, S. and Halvarsson, M.: Numerical Simulation of Deformation Development during Dynamic Tensile Extrusion of OFHC Copper Incorporating Microstructure Evolution. TMS Annual Meeting and Exibition, Orlando (2015).

Hörnqvist, M., Thuvander, M., Steuwer, A., King, S., Odqvist, J. and Hedström, P.: Early stages of spinodal decomposition in Fe-Cr resolved by in-situ small-angle neutron scattering. Appl. Phys. Lett. 106 (2015) 061911.

Hörnqvist, M., Mortazavi, N., Halvarsson, M., Ruggiero, A. Iannitti, G. and Bonora, N.: Deformation and texture development of OFHC Copper during dynamic tensile extrusion. Acta Mater. 89 (2015) pp. 163-180.


Hörnqvist, M., Viskari, L., Moore, K.L. and Stiller, K.: Multi-scale, multi-technique investigation of oxidation assisted cracking. 9th International Conference on Microscopy of Oxidation, Nottingham (2014).

Lindfeldt, E., Ahlström, J. Hörnqvist, M. and Peng, R.: Estimation of microscale strain felds in a pearlitic steel using DIC and in-situ SEM. Proceedings of the 14th European Mechanics and Materials Conference, Goteborg (2014).

Gaddam, R., Hörnqvist, M., Pederson, R. and Antti, M.-L.: Influence of high-pressure gaseous hydrogen on the low-cycle fatigue and fatigue crack growth properties of a cast titanium alloy. Mater. Sci. Eng. A. 612 (2014) pp. 354-362.

Joseph, C., Hörnqvist, M. and Persson, C.: Anisotropy of roome temperature ductility in Haynes 282 forgings.Proceedings of the 8th International Symposium on Superalloys 2014, Pittsburgh (2014).

Hörnqvist, M., Joseph, C., Persson, C., Weidow, J. and Lai, H.: Dynamic strain aging in Haynes 282 superalloy. Proceedings of the 2nd EuroSuperalloys Conference, Giens (2014). 

Hörnqvist, M., Viskari, L., Moore, K. and Stiller, K.: High-temperature crack growth in a Ni-base superalloy during sustained load. Mat. Sci. Eng. A. 609 (2014) 131-140.

Hörnqvist, M. and Viskari, L.: Reduced dwell-fatigue resistance in a Ni-base superalloy after short-time thermal exposure. Accepted for publication in Met. Mater. Trans. A 45 (2014) pp. 2699-2703.

Brommesson, R., Hörnqvist, M. and Ekh, M. Low-cycle fatigue crack growth in Ti-6242 at elevated temperatures. Advanced Materials Research 891-892 (2014) pp. 422-427.

Gaddam, R., Pederson, R., Hörnqvist, M. and Antti, M.-L.: Fatigue crack growth behaviour of forged Ti-6Al-4V in gaseous hydrogen. Corrosion Science 78 (2014) pp. 378-383.


Johansson, S., Viskari, L., Stiller, K., Hörnqvist, M. and Moverare, J. Fracture mechanisms during intergranular hold time fatigue crack growth in Inconel 718 superalloy. Proceedings of the 13th International Conference on Fracture, Beijing (2013).

Gaddam, R., Pederson, R., Hörnqvist, M. and Antti, M.-L. Influence of hydrogen environment on fatigue crack growth in forged Ti-6Al-4V: fractographic analysis. IOP Conf. Ser.: Mater. Sci. Eng. 48 (2013) 012010.

Viskari, L., Hörnqvist, M., Moore, K. L., Cao, Y. and Stiller, K. Intergranular crack tip oxidation in a Ni-base superalloy. Acta Mater. 61 (2013) pp. 3630.


Månsson, T., Hörnqvist, M., Hansson, T. and Backström. H. Applicability of handbook crack propagation methods on TIG and Laser welded IN718 at room and elevated temperature for mixed mode loading and dwell-time conditions. Proceedings of the 4th International Conference on the Integrity of High-Temperature Welds/9th International Conference on Creep and Fatigue at High Temperatures, London (2012).


Brommesson, R., Grauers. L., Ekh, M., Hörnqvist, M., Larsson, R. and Persson. C. Experiments and modelling of the cyclic behaviour of Haynes 282. Proceedings of the 2nd International Conference on Material Modeling, Paris (2011).

Gustafsson, D., Moverare, J. J., Johansson, S., Simonsson, K., Hörnqvist, M., Månsson, T. and Sjöström, S. Influence of high temperature hold times on the fatigue crack propagation in Inconel 718. Int. J. Fatigue 30 (2011) pp. 1461.

Hörnqvist, M., Månsson, T. and Gustafsson, D. High Temperature Fatigue Crack Growth in Alloy 718 – Effect of Tensile Hold Times. Procedia Engineering 10 (2011) pp. 147-152.

Gustafsson, D., Moverare, J, J., Simonsson, K., Johansson, S., Hörnqvist, M., Månsson, T. and Sjöström, S. Fatigue crack growth behaviour of Inconel 718 – the concept of a damaged zone caused by high temperature hold times. Procedia Engineering 10 (2011) pp. 2821-2826.


Hörnqvist, M., Viskari, L., Stiller, K. and Sjöberg, G. Hold-Time Fatigue Crack Growth in Allvac 718Plus Superalloy. Proceedings of the International Symposium on Superalloys 2010, Pittsburgh (2010).

Hörnqvist, M. and Månsson, T. Fatigue Crack Growth in Ti-6242 under Elasto-Plastic Loading. Procedia Eng. 2 (2010) pp. 223-229.

Hörnqvist, M., Hansson, T. and Clevfors, O. Fatigue Crack Growth Testing using Varying R-ratio. Procedia Eng. 2 (2010) pp. 155-161.

Hörnqvist, M. and Karlsson, B. Dynamic. Strain Ageing and Dynamic Precipitation during Cyclic Deformation of AA7030. Procedia Eng. 2 (2010) pp. 265-273.

Gustafsson, D., Moverare, J., Johansson, S., Hörnqvist, M., Simonsson, K., Sjöström, S. and Sharifimajd, B. Fatigue Crack Growth Behaviour of Inconel 718 with High Temperature Hold Times. Procedia Eng. 2 (2010) pp. 1095-1104.


Hörnqvist, M. and Karlsson, B. Effect of Heat Treatment on the Strain Hardening Behaviour of an Al-Zn-Mg Alloy. Int. J. Mater. Res. 100 (2009) pp. 1574-1581.


Hörnqvist, M. and Karlsson, B. Temperature and Strain Rate Effects on the Work Hardening Behaviour of AA7030. Proceedings of the 11th International Conference on Aluminium Alloys, Aachen (2008).

Hörnqvist, M., Karlsson, B. and Ahlström, J. Unloading Stiffness of Near Fully Pearlitic Steel UIC-R8/R8T During Cyclic Plastic Straining. Proceedings of the 6th International Conference on Low-Cycle Fatigue, Berlin (2008).

Hörnqvist, M. and Karlsson, B. Influence of Heat Treatment on the Cyclic Deformation Properties of Aluminium Alloys AA7030. Mat. Sci. Eng. A479 (2008) pp. 345. 


Hörnqvist, M. and Karlsson, B. Development of the Unloading Stiffness During Cyclic Plastic Deformation of a High-Strength Aluminium Alloy in Different Tempers. Int. J. Mat. Res. 98 (2007) pp. 1115. 


Hörnqvist, M. and Karlsson, B. Temperature and Strain Rate Effects on the Dynamic Strain Ageing of Aluminium Alloy 7030. Mat. Sci. Forum 519-521 (2006) pp. 883.

Johansson, M., Hörnqvist, M. and Karlsson, B. Influence of Strain Rate and Temperature on the Plastic Deformation of two Commercial High-Strength Al Alloys. Mat. Sci. Forum 519-521 (2006) pp. 841.

Hörnqvist, M. and Karlsson, B. Temperature and Strain Rate Dependence of the Dynamic Strain Ageing Effect in an Al-Zn-Mg Alloys. Mat. Sci. Tech. 22 (2006) pp. 213-223.


Hörnqvist, M. and Karlsson, B. Dynamic Strain Ageing Manifestations in an Extruded AA7030 Alloy Subjected to Tensile Deformation. Proceedings of the 11th International Conference on Fracture, Torino (2005).

Published: Fri 24 Jan 2020.