Browsing NTNU Open by Author "Wan, Di"
Now showing items 1-20 of 56
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Achieving superior dispersion-strengthening effect in an AA5xxx Al-Mg-Mn alloy by mico-alloying
Pan, Shiwei; Wang, Zidong; Li, Chunan; Wan, Di; Chen, Xiaohua; Chen, Kaixuan; Li, Yanjun (Peer reviewed; Journal article, 2023)5xxx Al-Mg based alloys are widely applied as non-heat-treatable alloys. In this work, we designed a dispersion-strengthening Al-4Mg-1Mn-0.3Fe-0.2Si-0.2Zr-0.2Cr (wt.%) alloy. By applying ramp heating and 400 °C isothermal ... -
Additive manufacturing of fine-grained and dislocation-populated CrMnFeCoNi high entropy alloy by laser engineered net shaping
Guan, Shuai; Wan, Di; Solberg, Klas; Berto, Filippo; Welo, Torgeir; Yue, Tai Man; Chan, K.C. (Journal article; Peer reviewed, 2019)The equiatomic CrMnFeCoNi high entropy alloy is additively manufactured by the laser engineered net shaping (LENSTM) process, and the solidification conditions, phase formation, as-deposited microstructures, and tensile ... -
Additive manufacturing of TiB2-containing CoCrFeMnNi high-entropy alloy matrix composites with high density and enhanced mechanical properties
Wang, Y.L.; Zhao, L; Wan, Di; Guan, Shuai; Chan, K.C. (Peer reviewed; Journal article, 2021)Near-fully dense CoCrFeMnNi high-entropy alloy (HEA) matrix composites reinforced with 5 wt% TiB2 nanoparticles were successfully additively manufactured via the laser-engineered net shaping technique. Compared to the ... -
Assessing fracture toughness of vintage and modern X65 pipeline steels under in situ electrochemical hydrogen charging using advanced testing methodology
Myhre, Aleksander Omholt; Wan, Di; Sendrowicz, Aleksander; Nyhus, Bård; Matsunaga, H.; Olden, Vigdis; Alvaro, Antonio; Vinogradov, Alexei (Peer reviewed; Journal article, 2024)The susceptibility of pipeline steels to hydrogen embrittlement, which can significantly impair mechanical performance, especially fracture toughness, is a critical issue in infrastructure integrity. This study evaluates ... -
Assessment of the potential of hydrogen plasma charging as compared to conventional electrochemical hydrogen charging on dual phase steel.
Depover, Tom; Hajilou, Tarlan; Wan, Di; Wang, Dong; Barnoush, Afrooz; Verbeken, Kim (Journal article; Peer reviewed, 2019)The present study evaluates the hydrogen induced damage by in-situ hydrogen plasma charging in dual phase (DP) steel. Cold deformation of 15% is applied on the material to change microstructural defects, such as dislocation ... -
Chemical heterogeneity enhances hydrogen resistance in high-strength steels
Sun, Binhan; Lu, Wenjun; Gault, Baptiste; Ding, Ran; Makineni, Surendra Kumar; Wan, Di; Wu, Chun-Hung; Chen, Hao; Ponge, Dirk; Raabe, Dierk (Journal article; Peer reviewed, 2021)The antagonism between strength and resistance to hydrogen embrittlement in metallic materials is an intrinsic obstacle to the design of lightweight yet reliable structural components operated in hydrogen-containing ... -
A comparative study on nanoscale mechanical properties of CrMnFeCoNi high-entropy alloys fabricated by casting and additive manufacturing
Liu, Siqi; Wan, Di; Guan, Shuai; Fu, Yuequn; Zhang, Zhiliang; He, Jianying (Journal article; Peer reviewed, 2024)Additive manufacturing (AM) has emerged as a pioneering method for fabricating high entropy alloys (HEAs), yet a comprehensive comparison of their nanoscale mechanical properties with those produced by the conventional ... -
Current Challenges and Opportunities Toward Understanding Hydrogen Embrittlement Mechanisms in Advanced High-Strength Steels: A Review
Sun, Binhan; Wang, Dong; Lu, Xu; Wan, Di; Ponge, Dirk; Zhang, Xiancheng (Peer reviewed; Journal article, 2021)Hydrogen embrittlement (HE) is one of the most dangerous yet most elusive embrittlement problems in metallic materials. Advanced high-strength steels (AHSS) are particularly prone to HE, as evidenced by the serious degradation ... -
Effect of electrochemical charging on the hydrogen embrittlement susceptibility of Alloy 718
Lu, Xu; Wang, Dong; Wan, Di; Zhang, Zhenbo; Kheradmand, Nousha; Barnoush, Afrooz (Peer reviewed; Journal article, 2019)The susceptibility of age-hardened nickel-based Alloy 718 to hydrogen embrittlement was studied by the controlled electrochemical charging combined with slow strain-rate tensile tests (SSRT) and advanced characterization ... -
Effect of Geometrical Irregularities on Fatigue of Lead Sheathing for Submarine High Voltage Power Cable Applications
Moreno, Edgardo; Viespoli, Luigi Mario; Johanson, Audun; Wan, Di; Alvaro, Antonio; Soma, Aurelio; Berto, Filippo (Peer reviewed; Journal article, 2021)High voltage subsea power cables are typically composed of several layers, including: a conductive core, a dielectric layer, a ductile metallic watertight barrier and a series of radial and axial armours and polymer layers. ... -
Effect of heat input on nanomechanical properties of wire-arc additive manufactured Al 4047 alloys
Liu, Siqi; Wan, Di; Peng, Ding; Lu, Xu; Ren, Xiaobo; Fu, Yuequn; Wang, Feng; Li, Yanjun; Zhang, Zhiliang; He, Jianying (Peer reviewed; Journal article, 2022)Heat input is one of the most important process parameters during additive manufacturing (AM). It is of great significance to understand the effect of heat input on the microstructure and nanomechanical properties, as well ... -
The effect of hydrogen on the crack initiation site of TRIP-assisted steels during in-situ hydrogen plasma micro-tensile testing: Leading to an improved ductility?
Depover, Tom; Wan, Di; Wang, Dong; Barnoush, Afrooz; Verbeken, Kim (Peer reviewed; Journal article, 2020)The hydrogen induced damage and crack initiation in transformation induced plasticity (TRIP) steel is considered in the present work by micro tensile testing and subsequent microstructural assessment. Hydrogen characteristics ... -
Effect of hydrogen on the embrittlement susceptibility of Fe-22Mn-0.6C TWIP steel revealed by in-situ tensile tests
Wang, Dong; Lu, Xu; Wan, Di; Guo, Xiaofei; Johnsen, Roy (Peer reviewed; Journal article, 2020)The hydrogen embrittlement (HE) behavior on a Fe–22Mn-0.6C twinning-induced plasticity (TWIP) steel was investigated by tensile tests with in-situ scanning electron microscope observation combined with electron backscatter ... -
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, ... -
Evaluation of hydrogen effect on the fatigue crack growth behavior of medium-Mn steels via in-situ hydrogen plasma charging in an environmental scanning electron microscope
Wan, Di; Ma, Yan; Sun, Binhan; Razavi, Seyed Mohammad Javad; Wang, Dong; Lu, Xu; Song, Wenwen (Peer reviewed; Journal article, 2021)Fatigue crack growth (FCG) tests were conducted on a medium-Mn steel annealed at two intercritical annealing temperatures, resulting in different austenite () to ferrite () phase fractions and different (meta-)stabilities. ... -
Examining the effect of indentation separation on the properties of gelatin-based films
Freeman, Ashley Amanda; Wan, Di; Bertolin, Chiara (Journal article; Peer reviewed, 2021)Understanding the mechanical behaviour and properties of artists’ materials is helpful for evaluating the failure of their structures during exhibition in confined spaces. Generally, macro-sized mock-ups of artists’ materials ... -
Fatigue assessment of as‐built and heat‐treated Inconel 718 specimens produced by additive manufacturing including notch effects
Solberg, Klas; Wan, Di; Berto, Filippo (Journal article; Peer reviewed, 2020)The fatigue behaviour of notched and unnotched specimens produced by additively manufactured Inconel 718 were analysed in the as‐built and heat‐treated conditions. The surfaces display high roughness and defects acting as ... -
Fatigue crack growth behavior of Ni-Cr-Mo-V steel welded joints considering strength mismatch effect
Song, Wei; Wang, Ping; Wan, Di; Qian, Guian; Correia, José; Berto, Filippo (Peer reviewed; Journal article, 2021)High strength steel welded joints are usually fabricated by heterogeneous weld metal for reducing the negative impacts of microstructural characteristics and defects on mechanical properties, such as hydrogen embrittlement ... -
Fatigue performance of shelled additively manufactured parts subjected to hot isostatic pressing
Du Plessis, Anton; Razavi, Seyed Mohammad Javad; Wan, Di; Berto, Filippo; Imdaadulah, Adam; Beamer, Chad; Shipley, James; MacDonald, Eric (Journal article; Peer reviewed, 2022)Additive manufacturing (AM) of metal components is increasingly used in high performance applications, especially in the aerospace industry. Laser powder bed fusion (L-PBF) of metals is the most widely used and mature ... -
FIB-SEM investigation and uniaxial compression of flexible graphite
Solfiti, Emanuele; Wan, Di; Celotto, Ambra; Solieri, N.; Muñoz, P.A.; Ximenes, R.F.; Heredia, J.M.; Torregrosa Martin, Martin; Perillo-Marcone, A.; Nuiry, F.X.; Alvaro, Antonio; Berto, Filippo; Calviani, M. (Peer reviewed; Journal article, 2023)Flexible graphite (FG) with ρ = 1 g/cm3 density is a type of highly porous and anisotropic graphite, mainly used for gaskets and sealing applications, but also suitable for energy absorption, such as in the beam dumping ...