Results 51 to 60 of about 225,646 (268)

Phase Transformations in Nickel base Superalloy Inconel 718 during Cyclic Loading at High Temperature

Production Engineering Archives, 2017
Nickel base superalloys are hi-tech materials intended for high temperature applications. This property owns a complex microstructure formed by matrix of Ni and variety of precipitates.
Michal Jambor, Otakar Bokůvka, František Nový, Libor Trško, Juraj Belan   +4 more
doaj   +2 more sources

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

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

Microstructure and strength of composite casting interface between Ti pretreated SiCf/SiC and Ni-based superalloy

Cailiao gongcheng
The integrated castings fabricated by SiCf/SiC composite and K403 Ni-based superalloy melt exhibited spontaneous fracture when cooled to room temperature.
LIN Guobiao, ZHU Fuhu, ZHAO Siwen
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

Effect of Al, Ti, Nb and Mo Content on γ′and η Precipitated Phase in a New Ni-25Cr-20Co Nickel Base Superalloy

Teshugang, 2013
The possible equilibrium precipitated phases in a new Ni-25Cr-20Co nickel base superalloy (/% ： 0.03C, 25Cr, 20Co, 0.50Mo, 1.38Al, 1.38Ti, 1.50Nb, others Ni) are analyzed by software Thermo-Cale to get the equilibrium condition diagram of the superalloy ...
郝文慧, 武敏, 罗刚, 王珏, 谢锡善   +4 more
doaj  

Directionally solidified eutectic gamma-gamma nickel-base superalloys [PDF]

, 1977
A directionally solidified multivariant eutectic gamma-gamma prime nickel-base superalloy casting having improved high temperature properties was developed.
Jackson, M. R.
core   +1 more source

Deformation‐Induced Formation of Stray Grains in Additive Manufacturing of Single Crystals

Advanced Science, EarlyView.
Stray grain formation severely limits the additive manufacturing of single‐crystal alloys. By integrating in situ synchrotron techniques, ex situ characterization, and multi‐scale multi‐physics modeling, the authors reveal that stray grains originate from dislocations at the solid‐liquid interface, rather than thermal supercooling in conventional ...
Dongsheng Zhang, Zixu Guo, Yuxiao Li, Lu Wang, Yu Wu, Darui Sun, Wentao Yan, Yuanyuan Guo, Han Wang, Wei Liu, Ye Tao, Bingbing Zhang   +11 more
wiley   +1 more source

The influence of γ′ morphology and size on stress rupture properties in Ni-base superalloy IN738LC

Journal of Materials Research and Technology
This study investigates the influence of γ′ precipitate morphology and size on the creep deformation of the cast superalloy IN738LC under conditions of 760–982 °C and 78–674 MPa. Two microstructures were obtained by different heat treatments.
Byung-Hoon Kim, Byeong-Ook Kong, Yun-Kon Joo, In-Su Son, Hyun-Uk Hong, Je-Hyun Lee   +5 more
doaj   +1 more source

Investigation of Shear Strength and Microstructure Formation of Joined Ni Superalloys Using Ni Nanopastes

Nanomaterials, 2022
By using Ni nanoparticles, the bonding of Ni base superalloys can be achieved with shear strengths well above 200 MPa in a joining process at comparatively low temperatures between 675 °C and 975 °C.
Benjamin Sattler, Susann Hausner, Guntram Wagner   +2 more
doaj   +1 more source