Journal Article10.1016/j.msea.2023.144795
Understanding the microstructure evolution characteristics and mechanical properties of an AlCoCrFeNi2.1 high entropy alloy fabricated by laser energy deposition
Weimin Guo,Yan Qiang Zhang,N. Ding,Long Liu,Huixia Xu,Nan Xu,Lu Tian,Guo-liang Liu,Dexiao Dong,Xiebin Wang +9 more
6
TL;DR: In this paper , an AlCoCrFeNi2.1 high entropy alloy is fabricated by laser energy deposition, which is held for 1 h and cooled in water to investigate the effect of heat-treating conditions on microstructure evolution and mechanical properties of the alloys.
read more
Abstract: In the present work, an AlCoCrFeNi2.1 high entropy alloy is fabricated by laser energy deposition. Specimens are heated to 700 °C (2#), 850 °C (3#) and 1000 °C (4#), respectively, held for 1 h and cooled in water to investigate the effect of heat-treating conditions on microstructure evolution and mechanical properties of the alloys. FCC(L12) + B2 dual-phase microstructure is acquired from all the four deposits. Ordered FCC (L12) disappears and transforms into B2 particles in 3# and 4#. Original B2 phase and newly formed B2 particles show K–S orientation relationship (OR) with adjacent FCC grains. Nano-sized phase m particles, which contain monoclinic lattice structure and have a composition similar with FCC phase, exist on FCC-BCC phase boundary in all the four deposits. FCC-m phase boundary is coherent. Existence of phase m in 4# indicates that it is stable at temperatures as high as 1000 °C. Precipitate hardening plays an important role in strengthening the materials, while the coarsening of precipitate particles weakens their strengthening effect. The high strength of this alloy group is also attributed to the two-phase interface strengthening effect. Possible reasons for the formation of m particles and their effect on the strength of the material are analyzed.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
An AlCoCrFeNi2.1 high-entropy alloy coating with uniform microstructure and high hardness
TL;DR: In this paper , the authors report that extreme high-speed laser cladding (EHLC) can fabricate coating with thickness of dozens and hundreds microns, whose microstructure and hardness are uniform.
7
Insight into annealing-induced hardening and softening behaviors in a laser powder-bed fusion printed in-situ composite eutectic high-entropy alloy
Yinuo Guo,Haijun Su,Hongliang Gao,Zhonglin Shen,Peixin Yang,Yuan Liu,Di Zhao,Zhuo Zhang,Min Guo +8 more
- 01 May 2024
7
Laser directed energy deposited eutectic high entropy alloy with tailored lamella structure via interlayer pause strategy
Zhouyang He,Xingbao Qiu,Xilei Bian,Shiwei Wu,Xiaolong Yu,Chenwei Liu,Zhen Hu,Yuefei Jia,Weisen Zheng,Jinqiang Shi,Zhibin Wu,Xiao‐Gang Lu,Yandong Jia,Gang Wang +13 more
4
Additive Manufacturing of Eutectic High-Entropy Alloys: A Comprehensive Review of Processing, Properties, and Machine Learning Approach
Sheetal Kumar Dewangan,Sandeep Jain,Man Mohan,Manoj Choudhari,Han Sang Lee,Byungmin Ahn,Yongho Jeon +6 more
Enhancing corrosion resistance in AlCrFeNiTix coatings via Ti-induced microstructural evolution and passive film optimization
Kun Yue,Lin Wang,Chunlong Cheng,Yeqing Wang,Yu Fan,Jie Xu,Zhijun Wang,Chang-Lin Yang,Zheng Chen +8 more
References
Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes
Jien-Wei Yeh,Swe-Kai Chen,Su-Jien Lin,Jon-Yiew Gan,Tsung-Shune Chin,Tsung-Shune Chin,Tao-Tsung Shun,Chun-Huei Tsau,Shou-Yi Chang +8 more
TL;DR: A new approach for the design of alloys is presented in this paper, where high-entropy alloys with multi-principal elements were synthesized using well-developed processing technologies.
11.7K
A fracture-resistant high-entropy alloy for cryogenic applications
Bernd Gludovatz,Anton Hohenwarter,Dhiraj Catoor,Edwin H. Chang,Easo P. George,Easo P. George,Robert O. Ritchie,Robert O. Ritchie +7 more
TL;DR: This work examined a five-element high-entropy alloy, CrMnFeCoNi, which forms a single-phase face-centered cubic solid solution, and found it to have exceptional damage tolerance with tensile strengths above 1 GPa and fracture toughness values exceeding 200 MPa·m1/2.
Metastable high-entropy dual-phase alloys overcome the strength–ductility trade-off
TL;DR: In this metastability-engineering strategy, a transformation-induced plasticity-assisted, dual-phase high-entropy alloy (TRIP-DP-HEA) is designed, which combines the best of two worlds: extensive hardening due to the decreased phase stability known from advanced steels and massive solid-solution strengthening of high-ENTropy alloys.
3.2K
Recent progress in high-entropy alloys
TL;DR: In this paper, the authors consider a large number of alliages a haute entropie (AHE) which are characterized by a large amount of microstructures and fragiles, e.g., nanocristallines and meme amorphes.
1.8K
Alloy Design Strategies and Future Trends in High-Entropy Alloys
TL;DR: In this paper, four core effects of high-entropy alloys were emphasized, several misconceptions on HEAs were clarified, and several routes for future HEA research and development were suggested.
1.3K