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Ankush Kashiwar

Ankush Kashiwar

PhD Student
Electron Microscopy and Spectroscopy Laboratory
Research Unit: Nanostructured Materials
Room: 0-107
Phone: 0721/608-28932
ankush kashiwarScr4∂partner kit edu

Project: In situ TEM studies on mechanical deformation of nanocrystalline metals



Education

2015-present

Doctor of Philosophy (PhD), Materials and Geosciences, Technische Universität Darmstadt, Germany

2012-2014       

Master of Engineering (ME), Materials Engineering, Indian Institute of Science, Bangalore, India

2008-2012

Bachelor of Technology (B.Tech.), Metallurgical and Materials Engineering, Visvesvaraya National Institute of Technology, Nagpur, India

Research Interests

My research is dedicated towards developing a closer link between the deformation structure and underlying deformation mechanisms in nano structured materials with an emphasis on nanocrystalline metals. My major 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 my current interest is to better elucidate the deformation processes in nanostructured materials in real time. Apart from in situ deformation studies, my research is also focused on imaging and analysing the structural changes in polycrystalline metals and precipitation studies in some alloys in real time by in situ TEM heating studies. Further more it also involves investigation of the ex situ deformed structure of nanocrystalline samples subjected to varying deformation techniques. My former research activities included 3D microstructural characterization in some Ni and Ti based alloys using serial sectioning techniques.

Publications


  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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

  1. In situ cyclic deformation studies on nanocrystalline Pd thin films using ACOM-TEM, A. Kashiwar, H. Hahn, C. Kübel, 24-29 June, NANO 2018, Hong Kong.                                                                                                                                                                                                                                                                                                                                                           
  2. 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.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
  3. Imaging structural evolution in nanocrystalline metals during mechanical deformationC. Kübel, A. Kobler, A. Kashiwar, H. Hahn, EMMC16, 26-28 March 2018, Nantes, France.                                                                                                                                                                                                                                                                                                                                  
  4. 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, 11-15 March 2018, Phoenix, Arizona, USA.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
  5. 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, 10-12 October 2017, Erlangen, Germany.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
  6. 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, 17-22 September 2017, Thessaloniki, Greece.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
  7. 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, 17-22 September 2017, Thessaloniki, Greece.                                                                                                                                                                                                                                                   
  8. 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.                                                                                                                                                                                                                                                        
  9. Electron Microscopy in Materials ScienceA. Kashiwar, DAAD Scholarship Holder’s Meeting, 1-3 April 2016, Munich, Germany.