Results 41 to 50 of about 3,253,810 (284)

X-ray microdiffraction and strain gradient crystal plasticity studies of geometrically necessary dislocations near a Ni bicrystal grain boundary [PDF]

, 2009
We compare experimental measurements of inhomogeneous plastic deformation in a Ni bicrystal with crystal plasticity simulations. Polychromatic X-ray microdiffraction, orientation imaging microscopy and scanning electron microscopy, were used to ...
Barabash, R.I., Barabash, O.M., Ohashi, Tetsuya, Pang, J.W.L.   +3 more
core   +2 more sources

Evidence of austenite memory in PH 15-5 and assessment of its formation mechanism

Materials & Design, 2019
Austenite memory and subsequent spontaneous recrystallization during austenitization is stated for some types of soft martensitic stainless steels such as X4CrNiMo16-5-1 or 13Cr5Ni but have not been proposed for the commercial alloy PH15-5 until now ...
Dominik Brandl, Marina Lukas, Martin Stockinger, Sarah Ploberger, Gerald Ressel   +4 more
doaj   +1 more source

Probing the Deformation Mechanisms of Nanocrystalline Silver by In-Situ Tension and Synchrotron X-ray Diffraction

Metals, 2020
The mechanisms responsible for the deformation of nanocrystalline materials are not well understood although many mechanisms have been proposed. This article studies the room-temperature stress-strain relations of bulk nanocrystalline silver deformed in ...
Baoru Sun, Tongde Shen
doaj   +1 more source

Role of geometrically necessary dislocations on mechanical properties of friction stir welded single-phase copper with medium stacking fault energy

Journal of Materials Research and Technology, 2022
The contribution of geometrically necessary dislocations (GNDs) and grain boundaries (GBs) on the mechanical properties of different zones in a friction stir welded pure copper joint is unveiled. This representative and simple medium stacking fault metal
Akbar Heidarzadeh, Roghayeh Mohammadzadeh, Hamid Reza Jafarian, Catalin Iulian Pruncu, Aude Simar   +4 more
doaj   +1 more source

INTERPRETATION OF GRAIN BOUNDARY NONEQUILIBRIUM IN TERMS OF GEOMETRICALLY NECESSARY AND STATISTICALLY STORED DISLOCATIONS

, 1990
It is proposed that the energy of grain boundaries in the state of non-equilibrium caused by trapped lattice dislocations (TLDs) can be calculated based on the theory of geometrically necessary dislocations of Ashby.
W. LOJKOWSKI, J. WYRZYKOWSKI, J. KWIECISKI   +2 more
core   +1 more source

DigiChrom: A Domain Ontology for Semantic Representation of Trivalent Chromium Platings and Its Large Language Model‐Based Alignment With Multiple Mid‐Level Ontologies

Advanced Engineering Materials, EarlyView.
Digitalizing electroplating requires both domain knowledge and interoperability. This work introduces PlatOn, a domain ontology for trivalent chromium plating and coating characterization, and a hybrid pipeline that aligns it to a mid‐level reference ontology by combining eight similarity metrics with language model reasoning. Expert‐validated mappings
Janik Harter, Elena Garcia Trelles, Christoph Schweizer, Thomas Seifert, Christoph Baumer, Mahmoud Elkady, Katja Feige, Daniel Grimme, Edgar Hoffmann, Andreas Waibel, Anke Walter   +10 more
wiley   +1 more source

Heterostructure enables new deformation mechanisms to enhance strength and work hardening

Materials Research Letters
Reflection of geometrically necessary dislocations (GNDs) has been reported effective in increasing strength and ductility of dual-phase alloys. However, this mechanism is rarely observed in conventional single-phase alloys. Here we report the activation
Bo Gao, Xinxin Dong, Xuefei Chen, Lirong Xiao, Qi Zhou, Xiaodong Han, Dongdi Yin, Hao Zhou, Yuntian Zhu   +8 more
doaj   +1 more source

In-situ observation of dislocation dynamics near heterostructured interfaces

Materials Research Letters, 2019
There has been a long-standing controversy on how dislocations interact with interfaces. Here we report in-situ observations that in a Cu–brass heterostructured TEM film Frank–Read sources are the primary dislocation sources. They were dynamically formed
Hao Zhou, Chongxiang Huang, Xuechao Sha, Lirong Xiao, Xiaolong Ma, Heinz Werner Höppel, Mathias Göken, Xiaolei Wu, Kei Ameyama, Xiaodong Han, Yuntian Zhu   +10 more
doaj   +1 more source

Viewpoint: experimental recovery of geometrically necessary dislocation density in polycrystals

Scripta Materialia, 2003
Abstract Application of electron backscattering diffraction methods to recover estimates of the geometrically necessary dislocation density is described. The limitations of the method arising from the opacity of crystalline materials and the spatial and angular resolution limits are discussed.
B.S El-Dasher, B.L Adams, A.D Rollett
openaire   +2 more sources

High‐Resolution Corrosion Fingerprinting of Alloy Libraries via Microdroplet Spectroelectrochemistry

Advanced Engineering Materials, EarlyView.
Ionic‐liquid microdroplet spectroelectrochemistry enables stable, localized electrochemical measurements over extended timescales. By coupling impedance spectroscopy, wetting analysis, finite‐element simulations, and operando Raman spectroscopy, it disentangles geometrical and electrochemical effects, opening new opportunities for rapid corrosion ...
Ekaterina Kurchavova, Oumaïma Gharbi, Mireille Turmine, Vincent Vivier   +3 more
wiley   +1 more source