Blar i NTNU Open på forfatter "Wan, Di"
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Hydrogen embrittlement of additively manufactured AlCoCrFeNi2.1 eutectic high-entropy alloy
Wan, Di; Guan, Shuai; Wang, Dong; Lu, Xu; Ma, Jun (Peer reviewed; Journal article, 2022)AlCoCrFeNi2.1 eutectic high-entropy alloy (HEA) was fabricated in as-cast and additively manufactured (AM) states. The hydrogen embrittlement susceptibility of both materials was investigated through in-situ uniaxial tensile ... -
Hydrogen Enhanced Fatigue Crack Growth Rates in a Ferritic Fe-3wt%Si Alloy
Alvaro, Antonio; Wan, Di; Olden, Vigdis; Barnoush, Afrooz (Journal article; Peer reviewed, 2018)It is well known that the presence of hydrogen in ferrous materials promotes both static fracture and affect the material fatigue crack growth rates. The latter is often referred to as Hydrogen Enhanced Fatigue Crack Growth ... -
Hydrogen enhanced fatigue crack growth rates in a ferritic Fe-3 wt%Si alloy and a X70 pipeline steel
Alvaro, Antonio; Wan, Di; Olden, Vigdis; Barnoush, Afrooz (Journal article; Peer reviewed, 2019)It is well known that ferrous materials can be damaged by absorption of hydrogen. If a sufficient quantity of hydrogen penetrates into the material, static fracture and the material's fatigue performances can be affected ... -
Hydrogen-Assisted Fatigue Crack Growth in Ferritic Steels
Wan, Di (Doctoral theses at NTNU;2019:251, Doctoral thesis, 2019) -
Hydrogen-assisted fatigue crack growth in ferritic steels – a fractographic study
Wan, Di; Alvaro, Antonio; Olden, Vigdis; Barnoush, Afrooz (Journal article; Peer reviewed, 2018)Fatigue crack growth (FCG) behavior of a Fe-3wt.%Si ferritic alloy under different environmental conditions using in-situ electrochemical (cathodic) hydrogen (H) charging has been investigated. Three frequencies have been ... -
Hydrogen-enhanced fatigue crack growth behaviors in a ferritic Fe-3wt%Si steel studied by fractography and dislocation structure analysis
Wan, Di; Alvaro, Antonio; Olden, Vigdis; Barnoush, Afrooz (Journal article; Peer reviewed, 2019)The effect of hydrogen (H) on the fatigue behavior is of significant importance for metallic structures. In this study, the hydrogen-enhanced fatigue crack growth rate (FCGR) tests on in-situ electrochemically H-charged ... -
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 ... -
Hydrogen-material interactions on austenitic and super duplex stainless steels
Basa, Adina (Doctoral theses at NTNU;2022:120, Doctoral thesis, 2022)The interaction between hydrogen and structural materials has been intensively studied for many years. In this PhD thesis the effect of hydrogen on the mechanical properties of two stainless steels has been investigated ... -
Impact of conductor assembly indentation on the fatigue properties of copper power cable wires
Viespoli, Luigi Mario; Johanson, Audun; Dumoulin, Stephane; Hagen, Anette Brocks; Wan, Di; Berto, Filippo; Alvaro, Antonio (Peer reviewed; Journal article, 2022)The production process of high voltage power cables includes the assembly of the conductor, which is composed of different layer of independent wires wound in helixes of opposite pitch for each subsequent layer. Each wire, ... -
The impact of thermo-mechanical processing routes on product quality in integrated aluminium tube bending process
Ma, Jun; Welo, Torgeir; Wan, Di (Peer reviewed; Journal article, 2021)This study was conducted to provide a better understanding of the role of electric field strength in the production of aftereffects in resting state scalp electroencephalography by repetitive transcranial magnetic stimulation ... -
Impurity removal from Si by Si-Ca-Mg ternary alloying-leaching system
Zhu, Mengyi; Wan, Di; Tang, Kai; Safarian, Jafar (Peer reviewed; Journal article, 2020)In this work, Si-Ca-Mg alloys were made with different compositions and solidification conditions to investigate the impurity segregation and separation performance from Si, especially for the crucial P impurity at several ... -
An in-situ electrochemical nanoindentation (ECNI) study on the effect of hydrogen on the mechanical properties of 316L austenitic stainless steel
Basa, Adina; Wang, Dong; Espallargas, Nuria; Wan, Di (Peer reviewed; Journal article, 2021)In-situ electrochemical nanoindentation (ECNI) has been used to study the effect of hydrogen on the mechanical properties of austenitic stainless steel AISI 316L. Changing the electrode potential (via electrochemical ... -
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 observation of martensitic transformation in an interstitial metastable high-entropy alloy during cathodic hydrogen charging
Wang, Dong; Lu, Xu; Wan, Di; Li, Zhiming; Barnoush, Afrooz (Journal article; Peer reviewed, 2019)We show for the first time that a critical amount of dissolved hydrogen can induce a phase transformation from γ-austenite to ε-martensite in an interstitial metastable high-entropy alloy. This is demonstrated by in-situ ... -
In-situ tensile and fatigue behavior of electrical grade Cu alloy for subsea cables
Wan, Di; Hagen, Anette Brocks; Viespoli, Luigi Mario; Johanson, Audun; Berto, Filippo; Alvaro, Antonio (Peer reviewed; Journal article, 2022)Distribution of electrical energy through subsea power cables has an increasingly important role in the renewable power generation. The majority of the subsea cables uses copper (Cu) as a conductor material. Cables suspended ... -
Influence of hot-dip galvanization on the fatigue performance of high-strength bolted connections
Milone, Aldo; Foti, Pietro; Viespoli, Luigi Mario; Wan, Di; Mutignani, Francesco; Landolfo, Raffaele; Berto, Filippo (Peer reviewed; Journal article, 2024)In the present work, the influence of hot-dip galvanization (HDG) on the fatigue behaviour of high-strength bolted details is investigated through a set of 15 constant-amplitude tests. Cyclic behaviour of coated specimens ... -
Local mechanical properties and precipitation inhomogeneity in large-grained Al–Mg–Si alloy
Hagen, Anette Brocks; Wenner, Sigurd; Bjørge, Ruben; Wan, Di; Marioara, Calin Daniel; Holmestad, Randi; Ringdalen, Inga Gudem (Peer reviewed; Journal article, 2022)Al–Mg–Si (6xxx series) alloys show excellent mechanical properties due to the precipitates formed during heat treatment. However, heat treatment of these alloys results in a soft precipitation free zone (PFZ) close to grain ... -
Low cycle fatigue life prediction of 10CrNi3MoV steel and undermatched welds by damage mechanics approach
Song, Wei; Liu, Xuesong; Xu, Jie; Fan, Yu; Shi, Duanhu; Yang, Feng; Xia, Xiaolei; Berto, Filippo; Wan, Di (Peer reviewed; Journal article, 2021)Welding of steel is a technique frequently used in practical engineering applications; however, their mechanical performance is strongly dependent on the physical metallurgical status of the weldments. In the present study, ... -
Microstructure and nanomechanical behavior of an additively manufactured (CrCoNiFe)94Ti2Al4 high-entropy alloy
Liu, Siqi; Wan, Di; Guan, Shuai; Fu, Yuequn; Ren, Xiaobo; Zhang, Zhiliang; He, Jianying (Peer reviewed; Journal article, 2021)Recent substantial studies indicate that high-entropy alloys (HEAs) possess superior mechanical performance, including exceptional strength, high creep resistance, etc. However, additive manufacturing (AM), a burgeoning ... -
Microstructure and texture evolution during the manufacturing of in situ TiC-NiCr cermet through selective laser melting process
Aramian, Atefeh; Sadeghian, Zohreh; Wan, Di; Holovenko, Yaroslav; Razavi, Seyed Mohammad Javad; Berto, Filippo (Peer reviewed; Journal article, 2021)The effects of different selective laser melting (SLM) scan speeds (150 mm.s−1, 95 mm.s−1, 60 mm.s−1, 55 mm.s−1, and 50 mm.s−1) on the microstructure and texture evolution of in situ TiC-NiCr cermet were investigated in ...