scholarly journals High Entropy Alloys Manufactured by Additive Manufacturing

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 639 ◽  
Author(s):  
José M. Torralba ◽  
Mónica Campos
Keyword(s):  
Additive Manufacturing ◽  
Review Paper ◽  
Physical Metallurgy ◽  
High Entropy Alloys ◽  
Metallic Materials ◽  
Processing Conditions ◽  
High Entropy ◽  
New Material ◽  
Manufacturing Technologies ◽  
Structure And Microstructure

High entropy alloys have attracted much interest over the last 16 years due to their promising an unusual properties in different fields that offer many new possible application. Additionally, additive manufacturing has drawn attention due to its versatility and flexibility ahead of a new material challenge, being a suitable technology for the development of metallic materials. Moreover, high entropy alloys have demonstrated that many gaps exist in the literature on its physical metallurgy, and in this sense, additive manufacturing could be a feasible technology for solving many of these challenges. In this review paper the newest literature on this topic is condensed into three different aspects: the different additive manufacturing technologies employed to process high entropy alloys, the influence of the processing conditions and composition on the expected structure and microstructure and information about the mechanical and corrosion behavior of these alloys.

scholarly journals Process Optimization of High Entropy Alloys by Laser Additive Manufacturing

Authorea ◽  
2020 ◽  
Author(s):  
Modupeola Dada ◽  
Patricia Popoola ◽  
Ntombi Mathe ◽  
Sisa Pityana ◽  
Samson Adeosun ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Process Optimization ◽  
High Entropy Alloys ◽  
Laser Additive Manufacturing ◽  
High Entropy

Recent development of chemically complex metallic glasses:From accelerated compositional design, additive manufacturing to novel applications

2021 ◽  
Author(s):  
Yong Yang ◽  
Jingyang Zhang ◽  
Ziqing Zhou ◽  
Zhibo Zhang ◽  
Minhyuk Park ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Metallic Glasses ◽  
Electric Energy ◽  
High Entropy ◽  
Glass Forming ◽  
History Of Research ◽  
History Of ◽  
Compositional Design ◽  
Manufacturing Technologies ◽  
Novel Applications

Abstract Metallic glasses or amorphous alloys are an important engineering material that has a history of research of about 80-90 years. While different fast cooling methods were developed for multi-component metallic glasses between 1960s and 1980s, 1990s witnessed a surge of research interest in the development of bulk metallic glasses. Since then, one central theme of research in the metallic-glass community has been compositional design that aims to search for metallic glasses with a better glass forming ability, a larger size and/or more interesting properties, which can hence meet the demands from more important applications. In this review article, we focus on the recent development of chemically complex metallic glasses, such as high entropy metallic glasses, with new tools that were not available or mature yet until recently, such as the state-of-the-art additive manufacturing technologies, high throughput materials design techniques and the methods for big data analyses (e.g. machine learning and artificial intelligence). We also discuss the recent use of metallic glasses in a variety of novel and important applications, from personal healthcare, electric energy transfer to nuclear energy that plays a pivotal role in the battle against global warming.

scholarly journals Additive Manufacturing of High-Entropy Alloys: A Review

Entropy ◽  
2018 ◽  
Vol 20 (12) ◽  
pp. 937 ◽  
Author(s):  
Shuying Chen ◽  
Yang Tong ◽  
Peter Liaw
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
High Efficiency ◽  
Mechanical Performance ◽  
Heating Temperature ◽  
Intermetallic Phase ◽  
Solid Solution Phase ◽  
High Entropy Alloys ◽  
Scanning Method ◽  
High Entropy

Owing to the reduced defects, low cost, and high efficiency, the additive manufacturing (AM) technique has attracted increasingly attention and has been applied in high-entropy alloys (HEAs) in recent years. It was found that AM-processed HEAs possess an optimized microstructure and improved mechanical properties. However, no report has been proposed to review the application of the AM method in preparing bulk HEAs. Hence, it is necessary to introduce AM-processed HEAs in terms of applications, microstructures, mechanical properties, and challenges to provide readers with fundamental understanding. Specifically, we reviewed (1) the application of AM methods in the fabrication of HEAs and (2) the post-heat treatment effect on the microstructural evolution and mechanical properties. Compared with the casting counterparts, AM-HEAs were found to have a superior yield strength and ductility as a consequence of the fine microstructure formed during the rapid solidification in the fabrication process. The post-treatment, such as high isostatic pressing (HIP), can further enhance their properties by removing the existing fabrication defects and residual stress in the AM-HEAs. Furthermore, the mechanical properties can be tuned by either reducing the pre-heating temperature to hinder the phase partitioning or modifying the composition of the HEA to stabilize the solid-solution phase or ductile intermetallic phase in AM materials. Moreover, the processing parameters, fabrication orientation, and scanning method can be optimized to further improve the mechanical performance of the as-built-HEAs.

Materials and manufacturing renaissance: Additive manufacturing of high-entropy alloys

2020 ◽  
Vol 35 (15) ◽  
pp. 1963-1983 ◽  
Author(s):  
Jinyeon Kim ◽  
Akane Wakai ◽  
Atieh Moridi
Keyword(s):  
Additive Manufacturing ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Image Position

Abstract

Physical metallurgy of concentrated solid solutions from low-entropy to high-entropy alloys

2017 ◽  
Vol 21 (6) ◽  
pp. 299-311 ◽  
Author(s):  
Chun-Yang Cheng ◽  
Ya-Chu Yang ◽  
Yi-Zhen Zhong ◽  
Yang-Yuan Chen ◽  
Tung Hsu ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Physical Metallurgy ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Low Entropy
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