Microstrucuture Homogeneity Analysis of In-situ Laser Alloying FeCoCrNi High Entropy AlloyHOU
Yaqing1*, SU Hang1,
ZHANG Hao1,3, WANG Changchang2
1 Material Digital R&D Center, China Iron & Steel Research Institute
Group, Beijing, 100081, China;
2 Beijing MATDAO Technology Co., Ltd, Beijing
100081, China;
3 Chongqing ADRAYN Technology Co., Ltd, Chongqing 401329, China
ABSTRACT: One of the most
important challenges for High throughput experiment (HTE) is to develop
techniques for preparing bulk samples to realize the direct characterization of
macroscopic mechanical properties. Combine 3D metallic printing technology with
high throughput synthesis technology and applied on high entropy alloys and
other novel material development, can obtain the material data of composition,
structure, properties and kinetics effectively. The combined method not only
can promote the development of material technology innovation, but also can
provide strong strategic support to the key material in the field of military
industry, energy, petrochemical and offshore areas. There are both great
scientific significance and application value. In this paper, FeCoCrNi
equi-atomic high-entropy alloys were fabricated by SLM laser in-situ alloying
by mechanical mixing of elemental powder. SEM, EDS and tensile test at room
temperature were used to characterize the microstructure homogeneity and
mechanical properties of the as-built samples which were also compared with the
samples prepared by traditional arc melting method. CALPHAD calculation and
finite element analysis were combined to further analyze the influence
mechanism of printing technology on the microstructure and properties of
as-built samples.
Keywords: high throughput synthesis, laser in-situ alloying, CALPHAD, 3D printing, high entropy alloys
Yaqing HOU, Engineer. She is currently working as director of the developing and operating department at Material Digital R&D Center in China Iron & Steel Research Institute Group. She has been responsible for the marketing and technical support of the Thermo-Calc software for 7 years. Now, she is working on the developing and operating of the Material Digital research platform. Furthermore, she has attended some projects such as National Key R&D Program of China about MGI, National Nature Science foundation of China and also projects about building the industrial cloud. Currently, she is pursuing her PhD degree at the Central Iron& Steel Research Institute, and her research direction is on material thermodynamic calculation, high-throughput experiment and 3D printing of metals.