Results 31 to 40 of about 3,377 (177)

The Evolution of Abnormal Grains during the Heating Stage of a Post-Weld Solution Treatment in a Friction-Stir-Welded 2519 Aluminium Alloy

Metals, 2023
This work presents an in-depth investigation of the early stages of abnormal grain growth (AGG) in a friction-stir-welded (FSWed) 2519-T820 aluminium alloy. Microstructural evolutions, which occurred during the heating stage of a solution heat treatment (
Ivan S. Zuiko, Sergey Malopheyev, Salaheddin Rahimi, Sergey Mironov, Rustam Kaibyshev   +4 more
doaj   +1 more source

Quantifying Additive Manufacturing Vapor Plumes Using Laser‐Induced Breakdown Spectroscopy, Synchrotron X‐Ray Radiography and Simulations

Advanced Science, EarlyView.
This study presents a novel in situ laser‐induced breakdown spectroscopy system for monitoring metal vapors produced by the intense laser‐metal interactions in laser powder bed fusion additive manufacturing and laser welding. The insights from this new technique reveal changes in alloy compositions and provide the first in situ validation of multi ...
Anna C. M. Getley, Samy Hocine, Junji Shinjo, Chinnapat Panwisawas, Marta Majkut, Alexander Rack, Peter D. Lee, Michael Towrie, Chu Lun Alex Leung   +8 more
wiley   +1 more source

Improving Mechanical Properties of 18%Mn TWIP Steels by Cold Rolling and Annealing

Metals, 2019
The microstructures and mechanical properties of Fe-0.4C-18Mn and Fe-0.6C-18Mn steels subjected to large strain cold rolling followed by annealing were studied.
Vladimir Torganchuk, Andrey Belyakov, Rustam Kaibyshev   +2 more
doaj   +1 more source

Transforming Grain‐Boundary Brittle Precipitates to Ductility Pathways in Complex Concentrated Alloy

Advanced Science, EarlyView.
By engineering graded BCC/L12 interfaces, brittle precipitates in a complex concentrated alloy enable sequential deformation, realizing gigapascal strength with >20% elongation to solve the strength‐ductility trade‐off. ABSTRACT Conventional wisdom holds that hard grain‐boundary (GB) precipitates embrittle structural alloys by acting as crack ...
Zhixin Li, Xiao‐Tong Li, Zhaoqi Chen, Yushan Geng, Hao Gong, Sijia Hu, Wenli Song, Wanshun Xia, Chuanzheng Li, Linfa Peng, Yue Fan, Pengfei Guan, Bo Zhang, Weihua Wang, Yong Yang   +14 more
wiley   +1 more source

Grain Boundary Assemblies in Dynamically-Recrystallized Austenitic Stainless Steel

Metals, 2016
The grain boundary misorientation distributions associated with the development of dynamic recrystallization were studied in a high-nitrogen austenitic stainless steel subjected to hot working. Under conditions of discontinuous dynamic recrystallization,
Marina Tikhonova, Pavel Dolzhenko, Rustam Kaibyshev, Andrey Belyakov   +3 more
doaj   +1 more source

Deformation mechanisms of low cycle fatigue of a fourth generation Ni-based single crystal superalloy

Journal of Materials Research and Technology, 2023
Ni-based single-crystal superalloys are extensively employed in turbine blades for aircraft and industrial gas engines. The blades are subjected to complex thermal and stress impacts during service, which may cause sudden low-cycle fatigue damage and ...
Pengfei Wang, Xinbao Zhao, Quanzhao Yue, Wanshun Xia, Qingqing Ding, Hongbin Bei, Yuefeng Gu, Xiao Wei, Ze Zhang   +8 more
doaj   +1 more source

Deformable Eutectic Alloy With Near‐Theoretical Yield Strength via Hierarchical Nanoscale Multiphases and Sessile Defects

Advanced Science, EarlyView.
A CoCrFeNiTa0.4 eutectic high‐entropy alloy achieves a near‐theoretical yield strength of 2.6 GPa with 13.6% plasticity. This breakthrough stems from a hierarchical nanostructure (FCC‐Laves lamellae with L12/D022 precipitates), which alleviates the inter‐phase modulus/hardness mismatch through synergistic strengthening and toughening, guiding the ...
Yusha Luo, Qianqian Wang, Bo Sun, Ruixin Sheng, Zhijun Guo, Gaopeng Zou, Zhe Jia, Yang Tong, Gang Sha, Peter K. Liaw, Baolong Shen   +10 more
wiley   +1 more source

Reaction Mechanism and Process Control of Hydrogen Reduction of Ammonium Perrhenate

Metals, 2020
The preparation of rhenium powder by a hydrogen reduction of ammonium perrhenate is the only industrial production method. However, due to the uneven particle size distribution and large particle size of rhenium powder, it is difficult to prepare high ...
Junjie Tang, Yuan Sun, Chunwei Zhang, Long Wang, Yizhou Zhou, Dawei Fang, Yan Liu   +6 more
doaj   +1 more source

Influence of thermal exposure on microstructural stability and tensile properties of a new Ni-base superalloy

Journal of Materials Research and Technology, 2022
The influence of long-term thermal exposure on microstructure evolution and tensile behavior of a new wrought γ′-hardened Ni-base superalloy at different temperatures are investigated.
Hao Liu, Xinbao Zhao, Yong Yuan, Yingying Dang, Weiqi Li, Jiachen Xu, Yuan Cheng, Quanzhao Yue, Yuefeng Gu, Ze Zhang   +9 more
doaj   +1 more source

Outstanding 1200 °C Oxidation Resistance in a Novel Multi‐Principal Element Alloy via Lattice Distortion‐Induced Diffusion Suppression

Advanced Science, EarlyView.
The unique lamellar structure of the eutectic alloy promotes selective oxidation of Al initially, while lattice distortion‐induced diffusion suppression slows oxide growth during steady state. Combining these strategies, a Multi‐Principal Element Alloy with excellent oxidation resistance at 1200℃ was designed.
Xinyu Zhang, Weiyan Lv, Xinguang Wang, Chuanmin Jia, Yizhou Zhou, Keqiang Qiu, Jianqiang Wang   +6 more
wiley   +1 more source