Results 61 to 70 of about 14,841 (305)

Microstructural refinement and mechanical properties improvement of elemental powder metallurgy processed Ti-46.6Al-1.4Mn-2Mo alloy by carbon addition

, 2019
Strengthening of a gamma TiAl alloy was sought by a chemical modification of the composition with carbon. Up to 0.6 at. pet of carbon was added to the Ti-46.6Al-1.4Mn-2Mo alloy processed by elemental powder metallurgy.
Park, HS, Yoo, YC, Nam, SW, Hwang, SK, Kim, NJ, Lee, CM   +5 more
core   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Influence of Mn on nanobainite formation kinetics and austenite retention in Al-added medium-Mn steels subjected to hybrid isothermal annealing

Journal of Materials Research and Technology
This study investigates the bainite transformation kinetics, microstructural evolution, and mechanical properties of Al-alloyed 3MnNb and 4MnNb multiphase steels subjected to a novel hybrid heat treatment.
Mateusz Morawiec, Jarosław Opara, Adam Skowronek, Alireza Kalhor, Aleksandra Kozłowska, Anna Wojtacha, Adam Grajcar   +6 more
doaj   +1 more source

Enhancing Strength and Electrical Conductivity in Al–Zr–Sc Conductor Alloys Through Sn and Sr Microalloying and Two‐Step Aging Treatment

Advanced Engineering Materials, EarlyView.
Trace additions of Sn and Sr combined with a two‐step aging treatment are shown to enhance the microstructure and performance of Al–Zr–Sc conductor alloys. Strength and electrical conductivity increase concurrently through accelerated precipitation of fine Al3(Sc, Zr) precipitates and improved dislocation resistance, offering a cost‐effective pathway ...
Quan Shao, Emad M. Elgallad, Alexandre Maltais, X.‐Grant Chen   +3 more
wiley   +1 more source

Grain Refinement in Undercooled Metals

, 1997
Recently, it was demonstrated that grain refinement in metals can take place through two mechanisms, namely, dynamic nucleation and remelting of initially formed dendrites. In this study, it was found that Ni99.45B0.55 undergoes grain refinement, both by
J. Z. Xiao, H. Yang, H. W. Kui
core   +1 more source

Microstructural characterization of nickel subjected to dynamic plastic deformation [PDF]

, 2012
Average microstructural parameters and the extent of microstructural heterogeneity in nickel deformed at a high strain rate have been characterized quantitatively and compared to those after compression at a quasi-static strain rate.
Zhang, Yubin, K. Lu, H.W. Zhang, Luo, Z.P., Mishin, Oleg, Lu, K., Zhang, H.W., Z.P. Luo, O.V. Mishin, Y.B. Zhang   +9 more
core   +1 more source

Part-agnostic ultrasonic melt pool vibration in wire-laser directed energy deposition

Materials & Design
Ultrasonic vibration assistance has proven itself as a useful tool in homogenizing microstructures and improving structural properties in localized fusion processes (welding, additive manufacturing, etc.).
Jakob D. Hamilton, P. Weisbeck, J. Trimberger, Irtaza Razvi, David Trauernicht, Denis Cormier, Iris V. Rivero   +6 more
doaj   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

Strain-Induced Grain Refinement of Cobalt During Surface Mechanical Attrition Treatment

, 2005
The microstructural evolution during surface mechanical attrition treatment of cobalt (a mixture of hexagonal close packed (hep) and face-centered cubic (fcc) phases) was investigated.
Lu K, Xu B, Lu J, 武晓雷, Tao N, Wu, X (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonliner Mech, Beijing 100080, Peoples R China., 洪友士, Liu G   +7 more
core   +1 more source

Strong, ductile, and hierarchical hetero-lamellar-structured alloys through microstructural inheritance and refinement

The strength−ductility trade-off exists ubiquitously, especially in brittle intermetalliccontaining multiple principal element alloys (MPEAs), where the intermetallic phases often induce premature failure leading to severe ductility reduction ...
Zhou, Rui, Jiang, Xin, Ren, Weili, Ding, Biao, Tan, Bodong, Li, Yi, Zhong, Yunbo, Zhu, Yuntian, Shi, Peijian, Liu, C. T., Yan, Jie, Wen, Tongqi, Luan, Junhua, Ren, Yang, Huang, Jingran, Ling, Chunyan, Wang, Yinan, Li, Zhi, Ye, Beilin, Gao, Huajian, Li, Qiang, Qin, Yi, Shen, Zhe, Lin, Yifan, Zheng, Tianxiang, Zhang, Tianlong   +25 more
core   +2 more sources