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Browsing NTNU Open by Author "Deng, Yun"

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Now showing items 1-12 of 12

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    • Effect of hydrogen on nanomechanical properties in Fe-22Mn-0.6C TWIP steel revealed by in-situ electrochemical nanoindentation 

      Wang, Dong; Lu, Xu; Deng, Yun; Guo, Xiaofei; Barnoush, Afrooz (Journal article; Peer reviewed, 2018)
      In-situ electrochemical nanoindentation was applied to study the effect of hydrogen on the mechanical properties of Fe-22Mn-0.6C TWIP steel at nanoscale. Distinctive behaviors in three defined grain orientations: (001), ...
    • Effect of hydrogen-induced surface steps on the nanomechanical behavior of a CoCrFeMnNi high-entropy alloy revealed by in-situ electrochemical nanoindentation 

      Wang, Dong; Lu, Xu; Deng, Yun; Wan, Di; Li, Zhiming; Barnoush, Afrooz (Peer reviewed; Journal article, 2019)
      The effect of hydrogen on the nanomechanical properties of CoCrFeMnNi high-entropy alloy was investigated by in-situ electrochemical nanoindentation testing. The changes in surface morphology, elastic modulus, pop-in load, ...
    • Environmental Embrittlement Revisited by In-Situ Miniature Fracture Testing Approach 

      Deng, Yun (Doctoral theses at NTNU;2019:25, Doctoral thesis, 2019)
    • Hydrogen embrittlement effect observed by in-situ hydrogen plasma charging on a ferritic alloy 

      Wan, Di; Deng, Yun; Barnoush, Afrooz (Journal article; Peer reviewed, 2018)
      To study the hydrogen embrittlement (HE) effect, a novel in-situ slow strain rate tensile test together with in-situ hydrogen (H) charging by H-plasma was conducted in an environmental scanning electron microscope (ESEM). ...
    • Hydrogen embrittlement revealed via novel in situ fracture experiments using notched micro-cantilever specimens 

      Deng, Yun; Barnoush, Afrooz (Journal article, 2018)
      The susceptibility of the FeAl intermetallic alloy to hydrogen-assisted cracking was investigated by in situ fracture experiments using notched micrometre-sized specimens using an Environmental Scanning Electron Microscope ...
    • Hydrogen susceptibility of an interstitial equimolar high-entropy alloy revealed by in-situ electrochemical microcantilever bending test 

      Lu, Xu; Wang, Dong; Zhiming, Li; Deng, Yun; Barnoush, Afrooz (Peer reviewed; Journal article, 2019)
      Hydrogen effect on an interstitial CoCrFeMnNi high-entropy alloy was investigated by micro-cantilever bending tests with pre-notched plane as a case study. Results showed sharp mode I cracks on plane bisecting two planes ...
    • Hydrogen-enhanced cracking revealed by in situ micro-cantilever bending test inside environmental scanning electron microscope 

      Deng, Yun; Hajilou, Tarlan; Barnoush, Afrooz (Journal article, 2017)
      To evaluate the hydrogen (H)-induced embrittlement in iron aluminium intermetallics, especially the one with stoichiometric composition of 50 at.% Al, a novel in situ micro-cantilever bending test was applied within an ...
    • Hydrogen-enhanced fatigue crack growth in a single-edge notched tensile specimen under in-situ hydrogen charging inside an environmental scanning electron microscope 

      Wan, Di; Deng, Yun; Meling, Jan Inge Hammer; Alvaro, Antonio; Barnoush, Afrooz (Journal article; Peer reviewed, 2019)
      Fatigue crack growth (FCG) test was done on a pre-cracked single-edge notched tensile (SENT) specimen with oligocrystalline ferritic structure. Innovative in-situ hydrogen (H)- charging by plasma inside an environmental ...
    • In situ micromechanical testing in environmental scanning electron microscope: A new insight into hydrogen-assisted cracking 

      Rogne, Bjørn Rune; Kheradmand, Nousha; Deng, Yun; Barnoush, Afrooz (Journal article; Peer reviewed, 2018)
      The susceptibility of Fe–26Al–0.5Cr (at.%) intermetallic alloy to hydrogen assisted cracking was evaluated by micromechanical fracture mechanics specimens. The notched micro-beams were loaded in situ in an environmental ...
    • In-situ micro-cantilever bending test in environmental scanning electron microscope: Real time observation of hydrogen enhanced cracking 

      Deng, Yun; Hajilou, Tarlan; Wan, Di; Kheradmand, Nousha; Barnoush, Afrooz (Journal article, 2017)
      A novel approach of in-situ micro-cantilever bending tests is introduced, integrating nanoindentation and environmental scanning electron microscopy (ESEM) to elucidate hydrogen embrittlement (HE) in FeAl. Bending tests ...
    • In-situ X-radiographic study of nucleation and growth behaviour of primary silicon particles during solidification of a hypereutectic Al-Si alloy 

      Xu, Yijiang; Deng, Yun; Casari, Daniele; Mathiesen, Ragnvald; Li, Yanjun (Peer reviewed; Journal article, 2020)
      Real-time observation of structure evolution in a hypereutectic Al-Si(-Cu) alloy under near-isothermal melt solidification condition was conducted by using in-situ micro-focus X-radiography. The nucleation, growth rate and ...
    • Insight into hydrogen effect on a duplex medium-Mn steel revealed by in-situ nanoindentation test. 

      Lu, Xu; Yan, Ma; Mohammad, Zamanzade; Deng, Yun; Wang, Dong; Wolfgang, Bleck; Wenwen, Song; Barnoush, Afrooz (Peer reviewed; Journal article, 2019)
      Medium-Mn steel is the newly developed steel acting as a promising candidate of the 3rd-generation advanced high strength steels. In the present study, the effect of hydrogen on the mechanical behavior and martensite ...

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