Effect of grain architecture on the ductility in ultrafine grained and nanocrystalline SPD materials

Objective:

The goal is to shed more light on the effect of grain architecture including grain shape, shape texture of grains and crystallographic texture, grain size and grain size distribution, grain boundary structure – on ductility and fracture toughness in ultrafine grained and nanocrystalline materials generated by SPD. The results will deliver a base for the improvement of ductility and fracture toughness of these novel materials for structural as well as for functional applications.

Acknowledgements: Funding for this research is provided by the Austrian Science Fund (FWF) under the project: P24141-N19

Duration: planned until December 2015

 

1. Scientific publications

  1. Hohenwarter Anton, Pippan Reinhard
    A comprehensive study on the damage tolerance of ultrafine-grained copper.
    Materials Science and Engineering A 540, (2012) 89-96.

 

  1. Rathmayr Georg B., Pippan Reinhard
    Extrinsic and intrinsic fracture behavior of high pressure torsion deformed nickel.
    Scripta Materialia 66, (2012) 507-510.

 

 

  1. Renk Oliver, Hohenwarter Anton, Pippan Reinhard
    Cyclic Deformation Behavior of a 316L Austenitic Stainless Steel Processed by High Pressure Torsion.
    Advanced Engineering Materials 14, (2012) 948-954.

 

  1. Bachmaier Andrea, Pippan Reinhard
    Generation of metallic nanocomposites by severe plastic deformation.
    International Materials Reviews 58, (2013) 41-62.

 

  1. Hohenwarter Anton, Pippan Reinhard
    Fracture of ECAP-deformed iron and the role of extrinsic toughening mechanisms.
    Acta Materialia 61, (2013) 2973-2983.

 

  1. Kammerhofer Christoph, Hohenwarter Anton, Scheriau Stephan, Brantner H.P., Pippan Reinhard
    Influence of morphology and structural size on the fracture behavior of a nanostructured pearlitic steel.
    Materials Science & Engineering A 585, (2013) 190-196.

 

  1. Krawczynska Agnieszka Teresa, Lewandowska Malgorzata, Pippan Reinhard, Kurzydlowski Krzysztof
    The Effect of High Pressure Torsion on Structural Refinement and Mechanical Properties of an Austenitic Stainless Steel.
    Journal of Nanoscience and Nanotechnology 5, (2013) 3246-3249.

 

  1. Rathmayr Georg B., Bachmaier Andrea, Pippan Reinhard
    Development of a New Testing Procedure for Performing Tensile Tests on Specimens with Sub-Millimetre Dimensions.
    Journal of Testing and Evaluation 41, (2013) 1-12.

 

  1. Rathmayr Georg B., Pippan Reinhard
    Influence of grain shape and orientation on the mechanical properties of high pressure torsion deformed nickel.
    Materials Science & Engineering A 560, (2013) 224-231

 

  1. Sabirov Ilshat, Pippan Reinhard
    About application of three dimensional analyses of fracture surfaces in fracture study on nanostructured titanium.
    Computational Materials Science 76, (2013) 72-79
  2. O. Renk, A. Hohenwarter, S. Wurster, R. Pippan
    Direct evidence for grain boundary motion as the dominant restoration mechanism in the steady-state regime of extremely cold-rolled copper Acta Materialia 77, (2014) 401 - 410.

 

  1. X. Sauvage, Y. Champion, R. Pippan, F. Cuvilly, L. Perrière, A. Akhatova, O. Renk  Structure and properties of a nanoscaled composition modulated metallic glass Journal of Materials Science 49, (2014) 5640 – 5645

 

  1. Bachmaier A., Rathmayr G.B., Bartosik M., Apel D., Zhang Z., Pippan R.
    New insights on the formation of supersaturated solid solutions in the Cu–Cr system deformed by high-pressure torsion.
    Acta Materialia 69, (2014) 301-313

 

  1. Hohenwarter A., Faller M., Rashkova B., Pippan R.
    Influence of heat treatment on the microstructural evolution of Al–3 wt.% Cu during high-pressure torsion.
    Philosophical Magazine Letters 94, (2014) 342-350.

 

  1. Leitner T., Hohenwarter A., Pippan R.
    Fatigue crack growth behavior of ultrafine-grained nickel produced by high pressure torsion.
    Procedia Materials Science 3, (2014) 1044-1049

 

  1. Rashkova B., Faller M., Pippan R., Dehm G.
    Growth mechanism of Al2Cu precipitates during in situ TEM heating of a HPT deformed Al–3wt.%Cu alloy.
    Journal of Alloys and Compounds 600, (2014) 43-50.
  2. Renk, O.; Hohenwarter, A.; Schuh, B.; Li, J. H.; Pippan, R.  Hardening by annealing: insights from different alloys. LTD, IOP PUBLISHING (Hrsg.) (36TH RISO INTERNATIONAL SYMPOSIUM ON MATERIALS SCIENCE); Riso (2015).

 

  1. Leitner, T.; Hohenwarter, A.; Pippan, R. Revisiting fatigue crack growth in various grain size regimes of Ni.  Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., Bd. 646[PR1] , (2015) S. 294-305.

 

  1. Maier, V.; Hohenwarter, A.; Pippan, R.; Kiener, D. Thermally activated deformation processes in body-centered cubic Cr - How microstructure influences strain-rate sensitivity. Scripta Mater., Bd. 106, (2015) S. 42-45.

 

  1. Schuh, B.; Mendez-Martin, F.; Voelker, B.; George, E. P.; Clemens, H. Pippan, R.; Hohenwarter, A.;  Mechanical properties, microstructure and thermal stability of a nanocrystalline CoCrFeMnNi high-entropy alloy after severe plastic deformation. Acta Mater., Bd. 96, (2015) S. 258-268
  2. Borchers, C.; Garve, C.; Tiegel, M.; Deutges, M.; Herz, A., Edalati, K.; Pippan, R.; Horia, Z.; Kirchheim, R.;  Nanocrystalline steel obtained by mechanical alloying of iron and graphite subsequently compacted by high-pressure torsion. Acta Mater., Bd. 97, (2015)S. 207-215.

 

  1. Hohenwarter, A.; Pippan, R. Fracture and fracture toughness of nanopolycrystalline metals produced by severe plastic deformation.

Philos. Trans. R. Soc. A-Math. Phys. Eng. Sci., Bd. 373 (2015), S. ARTN 20140366.

 

  1. Pippan R. Hohenwarter A. The importance of fracture toughness in ultrafine and nanocrystalline bulk materials. Mater.Res.Lett. (2016)

            DOI 10.1080/21663831.2016.1166403

 

Invited presentations

 

  1. Pippan Reinhard
    Herstellung von Nano-Verbundwerkstoffen durch Hochverformung.
    39. Skiwoche und 33. Werkstoffseminar (Institut für Angewandte Materialien Werkstoffkunde), Adelboden/SWITZERLAND, 13.03.2012

 

  1. Pippan Reinhard
    Plasticity on the micro scale: Structural refinement and the size effect of plasticity.
    Workshop Mechanics of Materials (Mathematisches Forschungsinstitut), Oberwolfach/GERMANY, 20.03.2012

 

  1. Pippan Reinhard, Bachmaier Andrea, Hohenwarter Anton, Rathmayr Georg
    Generation of nanocomposites and super saturated solid solutions by SPD.
    DPG 2012 (Deutsche Physikalische Gesellschaft), Berlin/GERMANY, 26.03.2012

 

  1. Pippan Reinhard, Bachmaier Andrea, Hohenwarter Anton, Renk Oliver, Rathmayr Georg, Champion Y., Sauvage Xavier
    Nanocomposites and super saturated solid solutions generated by SPD.
    International Workshop on Bulk Nanostructured Metals (University of Kyoto), Kyoto/JAPAN, 28.06.2012

 

  1. Pippan Reinhard, Wurster Stefan, Grosinger Wolfgang, Rathmayr Georg, Klünsner Thomas, Motz Christian
    Fatigue and Fracture in Micro Dimensions.
    IUTAM 2012 Symposium Fracture phenomena in nature and technology (University of Brescia), Brescia/ITALY, 03.07.2012

 

  1. Pippan Reinhard, Wurster Stefan, Grosinger Wolfgang, Rathmayr Georg, Klünsner Thomas, Motz Christian
    Fatigue and fracture of micro samples.
    ECF 19 (ESIS European Structural Integrity Society), Kazan/RUSSIAN FEDERATION, 28.08.2012

 

  1. Pippan Reinhard, Bachmaier Andrea, Hohenwarter Anton, Renk Oliver
    Nanocomposites and super saturated solid solutions generated by SPD: the effect of initial structure and strain path.
    33rd Risø International Symposium on Materials Science 2012 (Department of Wind Energy Technical University of Denmark), Roskilde/DENMARK, 05.09.2012

 

  1. Pippan Reinhard, Renk Oliver, Hohenwarter Anton
    Fracture toughness of HPT deformed titanium.
    International Workshop on Nanostructured Titanium based alloy for medical application: Mechanical properties and biocompatibility (European Commission under the 7th Framework Programme), Ein Gedi/ISRAEL; 23.01.2013

 

  1. Pippan Reinhard, Leitner Thomas, Renk Oliver, Kammerhofer Christoph, Marlene Kapp, Hohenwarter Anton, Yang Bo
    Deformation and fracture of nanocrystalline and ultrafine grained metals.
    MDP 2013, Workshop on Microstructure-driven Design & Performance of Advanced Metals (Shenyang National Laboratory for Materials Science, Insitute of Metal Research, Chinese Academy of Sciences), Shenyang/CHINA; 14.04.2013

 

  1. Pippan Reinhard, Leitner Thomas, Renk Oliver, Kammerhofer Christoph, Hohenwarter Anton, Yang Bo
    Fracture of Ultrafine Grained and Nanocrystalline Materials.
    7th International Conference on Materials Structure & Mirco-mechanics of fracture (MSMF7), Brno/CZECH REPUBLIC; 03.07.2013

 

  1. Pippan Reinhard, Leitner Thomas, Renk Oliver, Marlene Kapp, Karoline Kormout, Hohenwarter Anton, Yang Bo;
    Microstructures and Processes in Metals at Large Strains.
    GRC Physical Metallurgy "Materials at Extremes", Biddeford, Maine/USA; 29.07.2013

 

  1. Pippan Reinhard, Leitner Thomas, Yang Bo, Renk Oliver, Hohenwarter Anton, Kammerhofer Christoph, Kapp Marlene W., Kormout Karoline
    Fatigue and Fracture of Ultrafine Grained and Nanocrystalline Materials.
    MRS Fall 2013, Boston, MA/UNITED STATES.; 05.12.2013

 

  1. Pippan Reinhard , Grundner, K, T. Leitner, O. Renk, C.B. Yang, M.W. Kapp, L. Krämer, A. Hohenwarter
    Crack growth in SPD materials.
    NanoSPD6 - The 6th International Conference on Nanomaterials by Severe Plastic Deformation (LabEx DAMAS, Dir. Laszlo S. TOTH), Metz/FRANCE.; 30.06.2014

 

  1. Pippan Reinhard T. Leitner, O. Renk, C.B. Yang, M.W. Kapp, L. Krämer, A. Hohenwarter
    Wöhler Medal Lecture - Deformation, Fatigue, and Fracture of Ultrafine Grained and Nanocrystalline Materials.
    20 th European Conference on Fracture, Fracture at all scales (ESIS, NTNU - Norwegian University of Science and Technology), Trondheim/NORWAY.; 03.07.2014

 

  1. Pippan Reinhard, T. Leitner, O. Renk, C.B. Yang, M.W. Kapp, L. Krämer, A. Hohenwarter
    Deformation and Fracture or Ultrafine Grained and Nanocrystalline Materials.
    XII International Conference on Nanostructured Materials (Lomonosov Moscow State University), Moscow/RUSSIAN FEDERATION.; 15.07.2014

 

  1. Pippan Reinhard,T. Leitner, O. Renk, C.B. Yang, M.W. Kapp, L. Krämer, A. Hohenwarter
    Cracking behaviour of UFG-materials.
    41th Retreat Symposium (Friedrich-Alexander Universität Erlangen-Nürnberg), Sattelbogen/GERMANY.; 30.09.2014

 

  1. Renk Oliver, Kapp Marlene, Hohenwarter Anton, Motz Christian, Yang Bo, Pippan Reinhard Deformation induced grain boundary migration. Werkstoffseminar des IAM-WK, Adelboden/Schweiz; 10.03.2015

 

  1. Pippan Reinhard, Renk Oliver, Kapp Marlene, Hohenwarter Anton,Yang Bo,  (05.02.2015) Deformation induced grain bounadry migration. Physikseminar (Universität Göttingen), Göttingen/GERMANY

 

  1. Pippan, Rreinhard, Renk Oliver, Kapp Marlene, Hohenwarter Anton, Yang Bo,  (05.09.2015) Recent advances in research in SPD in Leoben. International Workshop on Giant Straining Process for Advanced Materials 2015 GSAM2015, Fukuoka/JAPAN.

 

  1. Pippan Reinhard, Renk Oliver, Kapp Marlene, Hohenwarter Anton,Yang Bo, Krämer Lisa, Ghosh Pradipta, (15.04.2015) Materialsynthese durch SPD.  Metallkunde-Kolloquium 2015, Lech am Arlberg/AUSTRIA.

 

  1. Pippan Reinhard, Renk Oliver, Kapp Marlene, Hohenwarter Anton, Motz Christian, Yang Bo,  (18.02.2015) Nano-structures by severe plastic deformation; the limiting stage of grain fragmentation. mechanical behavior of lightweight metals (Université de Lorraine - Metz), Metz/FRANCE

 

  1. Pippan, R., Oliver Renk, Kapp Marlene, Verena Mayer, Hohenwarter Anton,  (30.10.2015) Nano composites generated by severe plastic deformation.  Microstructure and Properties of advanced metallic materials, Erlangen/GERMANY.

 

  1. Pippan Reinhard, Hohenwarter Anton, Leitner Thomas, Renk Oliver, Yang Bo, Kapp Marlene, Kräme Lisa, Gupta Pradipta, Maier Verena, Grundner Katharina (10-14.5.2015) Deformation, Fatigue, and Fracture of Ultrafine Grained and Nanocrystalline Materials ICM12, Karlsruhe/Germany

 

Oral presentations and posters

 

  1. O. Renk, A. Hohenwarter, R. Pippan
    Cyclic deformation behavior of a 316L austenitic stainless steel processed by high pressure torsion
    Planneralm Seminar 2012, Erich Schmid Institut, Planneralm, Austria, 29.02.-02.03.2012
  2. O. Renk, A. Hohenwarter, G.B. Rathmayr, R. Pippan
    Effect of grain shape on toughness and ductility in metals processed by Severe Plastic Deformation
    Materials Science Engineering 2012, DGM, Deutsche Gesellschaft für Materialkunde e.V., Darmstadt, Germany, 24.-27.09.2012
  3. O. Renk, A. Hohenwarter, R. Pippan
    Cyclic deformation behavior of a 316L stainless steel processed by high pressure torsion
    23rd Colloquium on Fatigue Mechanisms, ECOLE NATIONALE SUPERIEURE DE MECANIQUE ET D´AEROTECHNIQUE (ENSMA), Poitiers-Futuroscope, France, 02.04.-04.04.2012
  4. O. Renk, A. Hohenwarter, R. Pippan
    The effect of severe plastic deformation on the fatigue behaviour of an austenitic stainless steel
    DPG Spring Meeting, Symposium Bulk Nanostructured Materials, DPG, Berlin, Germany, 25.03.-29.03.2012
  5. O. Renk, A. Hohenwarter, R. Pippan, Fatigue behavior of a nanocrystalline austenitic steel, TMS 2013, TMS, The Minerals, Metals & Materials Society, San Antonio, USA, 03.-07.03.2013
  6. O. Renk, A. Hohenwarter, R. Pippan, Revealing local deformation mechanisms in the steady state regime of extremely cold rolled copper, GRC Physical Metallurgy “Materials at Extremes”, Gordon Research Conference Series, Biddeford, Maine/USA, 27.07.-02.07.2013
  7. O. Renk, A. Hohenwarter, S. Wurster, R. Pippan, The mystery of structural saturation during Severe Plastic Deformation,  Scientific Advisory Board Meeting 2013, Erich Schmid Institute, Austria, 26.11.2013
  8. O. Renk, A. Hohenwarter, R. Pippan, Revealing local deformation mechanisms in the steady state regime of extremely cold rolled copper, Thermec 2013, Las Vegas, USA, 02.12.-06.12.2013
  9. O. Renk, A. Hohenwarter, R. Pippan Oxide particle vs. carbon doped nickel subjected to Severe Plastic Deformation: Which strengthening mechanisms is more damage tolerant? TMS 2014, TMS, The Minerals, Metals & Materials Society, San Diego, USA, 16.-20.02.2014
  10. O. Renk, A. Hohenwarter, S. Wurster, R. Pippan Grain boundary migration – a mechanism of plastic deformation? Metallkundekolloquium, Lech, Österreich, 23.04. – 25.04.2014
  11. O. Renk, A. Hohenwarter, S. Wurster, R. Pippan The mystery of structural saturation during Severe Plastic Deformation NanoSPD6, Metz, Frankreich, 30.06. - 04.07.2014
  12. O. Renk, A. Hohenwarter, S. Wurster, R. Pippan Softening during texture transition of UFG metals ICOTOM17, Dresden, Deutschland, 24.08. - 29.08.2014
  13. T. Leitner, A. Hochenwarter, R. Pippan, Fatigue crack growth investigations on ultrafine-grained metals produced by high pressure torsion 10th International Congress of Fatigue, Melbourne,  Australia 2-7.3.2014
  14. Renk Oliver, Hohenwarter Anton, Pippan Reinhard, Doubling fatique strength in nc materials by annealing, Plasticity 15, Montego Bay/JAMAIKA, 07.01.2015
  15. Grundner Katharina, Hohenwarter Anton, Pippan Reinhard,Fracture toughness investigations of a two phase steel deformed by high pressure torsion. ICSMA-17, Brünn/ CZECK REPUBLIC, 10.08.2015
  16. Renk Oliver, Pippan Reinhard (10.08.2015) Increasing the strength of nanocrystalline metals by annealing; is segregation necessary? ICSMA 2015, Brünn/CZECH REPUBLIC.; Typ: Sonstiger eingeladener Veranstaltungsbeitrag (internationale Veranstaltung
  17. Renk Oliver, Hohenwarter Anton, Pippan Reinhard (07.01.2015) Doubling fatigue strength in nc materials by annealing. Vortrag bei: Plasticity 2015 (Prof. Akthar Khan, University of Maryland), Montego Bay/JAMAICA.; Typ: Sonstiger Veranstaltungsbeitrag (internationale Veranstaltung
  18. Renk Olivere, Hohenwarter Anton, Pippan Reinhard (08.09.2015) Annealing effects in nanocrystalline materials. 36th Riso International Symposium on Materials Science Effects of Deformation Induced Structural Variations on Annealing Mechanisms, Roskilde/DENMARK.

Renk Oliver, Hohenwarter Anton, Pippan Reinhard (22.09.2015) Deformation induced grain boundary. European Congress and Exhibition on Advanced Materials and Processes (EUROMAT), Warschau/POLAND