INT | Research Group Kübel
Ankush Kashiwar A. Kashiwar

Ankush Kashiwar

  • Project: In situ TEM studies on nanostructured materials

Research Interests

Ankush Kashiwar is currently focusing on the experimental nanomechanics of nanocrystalline metals and nanolayered composite materials (multilayers) and investigating the deformation behaviour in these using transmission electron microscopy (TEM) techniques. His areas of expertise include state-of-the-art in situ TEM nanomechanics, precession electron diffraction based orientation mapping in TEM, FIB sample preparation and thin film deposition. Using a combination of these techniques his current interest is to better elucidate the deformation processes in nanostructured materials. Apart from in situ deformation studies, his research is also focused on microstructural evolution in a variety of alloys for structural applications under thermomechanical processing to investigate crystallographic texture, precipitation, oxidation behaviour and grain coarsening mechanisms using in situ or ex situ electron microscopy techniques. His former research activities included 3D microstructural characterization to investigate morphologies and complex arrangement of phases in some Ni and Ti based alloys for aerospace applications using serial sectioning techniques.

Education and Research Experience

07.2015-present

Ph.D., Materials Science (thesis under review)
Technical University of Darmstadt, Germany

07.2015-present

Research Fellow at Electron Microscopy and Spectroscopy Laboratory
Institute of Nanotechnology, Karlsruhe Institute of Technology, Germany

08.2015-09.2015

German Language Course (A2 waystage)
did deutsch-institut Frankfurt, Germany

07.2014-04.2015

Project Assistant
Interdisciplinary Center for Energy Research, Indian Institute of Science, Bangalore, India

08.2012-07.2014

M.E., Materials Engineering
Indian Institute of Science, Bangalore, India

05.2012-06.2012

Student Research Assistant
Institute of Nanotechnology, Karlsruhe Institute of Technology, Germany

07.2008-06.2012

B.Tech., Metallurgical & Materials Engineering
Visvesvaraya National Institute of Technology, Nagpur, India

05.2011-07.2011

Student Research Assistant
Institute of Nanotechnology, Karlsruhe Institute of Technology, Germany

Publications


  1. Nanowire Facilitated Transfer of Sensitive TEM Samples in a FIB.
    Gorji, S.; Kashiwar, A.; Mantha, L. S.; Kruk, R.; Witte, R.; Marek, P.; Hahn, H.; Kübel, C.; Scherer, T.
    2020. Ultramicroscopy, Article no: 113075. doi:10.1016/j.ultramic.2020.113075
  2. Early deformation mechanisms in the shear affected region underneath a copper sliding contact.
    Haug, C.; Ruebeling, F.; Kashiwar, A.; Gumbsch, P.; Kübel, C.; Greiner, C.
    2020. Nature Communications, 11 (1), Art.-Nr. 839. doi:10.1038/s41467-020-14640-2
  3. Grain growth mechanisms in ultrafine-grained steel: an electron backscatter diffraction and in situ TEM study.
    Ahmels, L.; Kashiwar, A.; Scherer, T.; Kübel, C.; Bruder, E.
    2019. Journal of materials science, 1–17. doi:10.1007/s10853-019-03611-8
  4. Recent advances in in situ TEM.
    Kübel, C.; Kumar, C. N. S.; Dehm, S.; Krupke, R.; Korad, M.; Wenzel, W.; Kashiwar, A.; Hahn, H.
    2019. DPG-Frühjahrstagung der Sektion Kondensierte Materie (SKM), Fachverband Metall- und Materialphysik (2019), Regensburg, Germany, March 31–April 5, 2019
  5. Engineering an ultrafine intermetallic eutectic ternary alloy for high strength and high temperature applications.
    Tiwary, C. S.; Kashiwar, A.; Bhowmick, S.; Hari Kumar, K. C.; Chattopadhyay, K.; Banerjee, D.
    2018. Scripta materialia, 157, 67–71. doi:10.1016/j.scriptamat.2018.07.036
  6. Imaging the Structural Evolution in Nanocrystalline Metals during Mechanical Deformation.
    Kübel, C.; Kobler, A.; Kashiwar, A.; Hahn, H.
    2017. Microscopy and microanalysis, 23 (S1), 748–749. doi:10.1017/S1431927617004408
  7. On variant distribution and coarsening behavior of the α phase in a metastable β titanium alloy.
    Balachandran, S.; Kashiwar, A.; Choudhury, A.; Banerjee, D.; Shi, R.; Wang, Y.
    2016. Acta materialia, 106, 374–387. doi:10.1016/j.actamat.2016.01.023
  8. Combination of in situ straining and ACOM TEM: A novel method for analysis of plastic deformation of nanocrystalline metals.
    Kobler, A.; Kashiwar, A.; Hahn, H.; Kübel, C.
    2013. Ultramicroscopy, 128, 68–81. doi:10.1016/j.ultramic.2012.12.019
  9. Deformation-induced grain growth and twinning in nanocrystalline palladium thin films.
    Kobler, A.; Lohmiller, J.; Schäfer, J.; Kerber, M.; Castrup, A.; Kashiwar, A.; Gruber, P. A.; Albe, K.; Hahn, H.; Kübel, C.
    2013. Beilstein journal of nanotechnology, 4, 554–566. doi:10.3762/bjnano.4.64
  10. Effect of solution annealing temperature on precipitation in 2205 duplex stainless steel.
    Kashiwar, A.; Vennela, N. P.; Kamath, S. L.; Khatirkar, R. K.
    2012. Materials characterization, 74, 55–63. doi:10.1016/j.matchar.2012.09.008

Conference Presentations

  • Quantitative orientation and phase mapping of nanostructured materials in TEM: in situ and ex situ applications, A. Kashiwar, C. Kübel, Workshop on Electrochemistry in Liquid TEM and on Orientation/Phase Mapping in Liquid, 27-29 May 2019, University of Picardy Jules Verne, Amiens, France.

  • In situ observation of grain rotation and the Bauschinger effect in nanocrystalline palladium thin films using ACOM-STEM, A. Kashiwar, H. Hahn, C. Kübel, 2019 MRS Spring Meeting & Exhibit, 22-26 April 2019, Phoenix, Arizona, USA. 

  • In situ cyclic deformation studies on nanocrystalline Pd thin films using ACOM-TEM, A. Kashiwar, H. Hahn, C. Kübel, NANO 2018,  24-29 June 2018, Hong Kong.

  • In situ thermal and mechanical studies using quantitative orientation mapping in TEM, A. Kashiwar, H. Hahn, C. Kübel, HGI INT International Training Workshop on Nanostructured Materials, 19-22 June 2018, Nanjing, China. 

  • Imaging structural evolution in nanocrystalline metals during mechanical deformationC. Kübel, A. Kobler, A. Kashiwar, H. Hahn, EMMC16, 26-28 March 2018, Nantes, France. 

  • In situ TEM imaging and quantitative orientation mapping of the structural evolution in nanocrystalline metals during mechanical deformationC. Kübel, A. Kobler, A. Kashiwar, H. Hahn, TMS 2018, 11-15 March 2018, Phoenix, Arizona, USA. 

  • Observation of nano-scaled carbide precipitation in low carbon lath martensite by in situ TEM heating coupled with ACOM-STEMA. Kashiwar, L. Morsdorf, A. Kobler, H. Hahn, C. Kübel, C. Cem Tasan,  ICEAM 2017, 10-12 October 2017, Erlangen, Germany. 

  • In situ TEM heating in combination with ACOM-STEM to follow the precipitation of nano-scaled carbides in lath martensiteA. Kashiwar, L. Morsdorf, A. Kobler, H. Hahn, C. Kübel, C. Cem Tasan, EUROMAT 2017, 17-22 September 2017, Thessaloniki, Greece. 

  • Deformation behaviour in multilayered thin films with different interface structures under sliding contactA. Kashiwar, Z.P. Luo, X. Mu, H. Hahn, C. Kübel, R. Schwaiger, EUROMAT 2017, 17-22 September 2017, Thessaloniki, Greece. 

  • Microstructural evolution in multilayered thin films with different interface structure under sliding contactA. Kashiwar, Z.P. Luo, X. Mu, H. Hahn, C. Kübel, R. Schwaiger, DPG-Spring Meeting, 19-24 March 2017, Dresden, Germany.   

  • Electron Microscopy in Materials ScienceA. Kashiwar, DAAD Scholarship Holder’s Meeting, 1-3 April 2016, Munich, Germany.                                                                  

Professional Society Membership

  • The Minerals, Metals & Materials Society (TMS)
  • Materials Research Society (MRS)
  • German Physical Society (DPG)
  • German Society for Electron Microscopy (DGE)
  • European Microscopy Society (EMS)

Review Contributions

  • Acta Materialia (1 review since August 2019)
  • Materials & Design (2 reviews since November 2018)

Awards and Fellowships

  • German Academic Exchange Service (DAAD) doctoral scholarship 2015-2019

  • German Society for Electron Microscopy (DGE) travel grant for MRS 2019 and TMS 2018 

  • Wilhelm and Else Heraeus Communication Programme travel grant for DPG 2017 

  • Institute Medal 2012, VNIT Nagpur, India

  • All India Rank 4 (Metallurgical Engineering) in Graduate Aptitude Test in Engineering (GATE) 2012 

  • Research fellowships by KIT, Germany, summer of 2011 and 2012 

  • Indian Academy of Sciences' Summer Research Fellowship Programme, 2011 and 2012 (declined the fellowships)

  • Academic Excellence Awards 2010, 2011 and 2012 in Metallurgical and Materials Engineering, VNIT Nagpur, India