Direct Metal Deposition by Laser in TiNi-Al System for Graded Structure Fabrication

International Seminar on Interdisciplinary Problems in Additive Technologies

材料科学;物理学

Shishkovsky, I.^1,2 ; Kakovkina, N.^1 ; Missemer, F.^2

P.N. Lebedev Physical Institute (LPI), Russian Academy of Sciences, Samara Branch, Samara

443011, Russia^1

Ecole Nationale d'Lngénieurs de Saint-Etienne, 58 rue Jean Parot, Saint-Etienne

42023, France^2

关键词: Cladding parameters;    Direct metal deposition;    EDX analysis;    Graded structure;    Gradient of properties;    Intermetallic phase;    Laser synthesis;    NiTi powders;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/140/1/012016/pdf
DOI  :  10.1088/1757-899X/140/1/012016

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Intermetallic phase formation was studied in powdered TiNi-Al system under layerwise laser cladding with the aim of forming a gradient of properties due to a change in the concentration relation of Al in the NiTi powder mixture from one layer to another. The relationship between the laser cladding parameters and the intermetallic phase structures in consecutively cladded layers were determined. The structure of intermetallic compounds formed by laser synthesis was studied by optical microscopy, measurement of microhardness, SEM with EDX analysis. Microhardness doubling from 500 HV to 1000 HV was achieved due to nitinol matrix enrichment by Al, which is promising for aerospace applications.