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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 kashiwarGbb7∂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. The research involves investigation of the deformation behavior of nanocrystalline metals using state-of-the-art in situ TEM nanomechanical testing and imaging methods that enable a better understanding of the deformation processes in real time. Using in situ nanomechanical testing in the TEM coupled with advanced imaging methods, especially TEM based automated crystal orientation mapping (ACOM-TEM), it is envisioned to qualitatively and quantitatively analyze the deformation processes. Apart from in situ deformation studies, the project encompasses imaging and analysing the grain boundary phenomena 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.

Publications


  1. 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
  2. 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
  3. 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
  4. 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. Imaging structural evolution in nanocrystalline metals during mechanical deformationC. Kübel, A. Kobler, A. Kashiwar, H. Hahn, EMMC16, 26-28 March 2018, Nantes, France.                                                                                                                                                                                                                                                                                                                                  
  2. 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.                                                                                                                                                                                                                         
  3. 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.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
  4. 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.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
  5. 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.                                                                                                                                                                                                                                                   
  6. 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.                                                                                                                                                                                                                                                        
  7. Electron Microscopy in Materials ScienceA. Kashiwar, DAAD Scholarship Holder’s Meeting, 1-3 April 2016, Munich, Germany.