ISSN 2594-5327
75° Congresso Anual da ABM — vol. 75, num.75 (2022)
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HIGHLY NI NITI ALLOYS (55 TO 58% AT. NI) HAVE BEEN UNDER-EXPLORED FOR SOME TIME DUE TO THEIR DIFFICULT MECHANICAL PROCESSING. THIS ALLOY HAS A HIGH HARDNESS AND CAN HAVE SUPERELASTICITY. IN THE LAST 10 YEARS THESE ALLOYS HAVE BEEN STUDIED AGAIN. THIS ARTICLE EVALUATES THE ANNEALING OF NITI ALLOYS WITH HIGH NI CONTENT (57.63% AT. NI AND 57.66% AT. NI). FOR THIS, GRADE 2 TI AND NI POWDER BARS WERE USED TO ELABORATE THE INGOTS IN A VAR (VACUUM ARC REMELTING) FURNACE WITH CU CRUCIBLE AND CONTROLLED ATMOSPHERE. THE TWO RESULTING INGOTS WERE ANNEALED IN A TUBULAR FURNACE FOR 2 HOURS AT 950 ° C AND HEATING RATE OF 10 ° C / MIN AND COOLED IN THE FURNACE’S INERTIA. THROUGH THE ANALYSIS OF OPTICAL MICROSCOPY AND SCANNING ELECTRON IT IS POSSIBLE TO VERIFY THAT THE TREATMENT PROVIDED A MORE HOMOGENEOUS MICROSTRUCTURE IN THE MATERIAL. THROUGH THE X-RAY DIFFRACTION ANALYZES IT WAS ALSO POSSIBLE TO IDENTIFY THE PRESENT PHASES, WHICH AFTER ANNEALING ARE SIMILAR.
HIGHLY NI NITI ALLOYS (55 TO 58% AT. NI) HAVE BEEN UNDER-EXPLORED FOR SOME TIME DUE TO THEIR DIFFICULT MECHANICAL PROCESSING. THIS ALLOY HAS A HIGH HARDNESS AND CAN HAVE SUPERELASTICITY. IN THE LAST 10 YEARS THESE ALLOYS HAVE BEEN STUDIED AGAIN. THIS ARTICLE EVALUATES THE ANNEALING OF NITI ALLOYS WITH HIGH NI CONTENT (57.63% AT. NI AND 57.66% AT. NI). FOR THIS, GRADE 2 TI AND NI POWDER BARS WERE USED TO ELABORATE THE INGOTS IN A VAR (VACUUM ARC REMELTING) FURNACE WITH CU CRUCIBLE AND CONTROLLED ATMOSPHERE. THE TWO RESULTING INGOTS WERE ANNEALED IN A TUBULAR FURNACE FOR 2 HOURS AT 950 ° C AND HEATING RATE OF 10 ° C / MIN AND COOLED IN THE FURNACE’S INERTIA. THROUGH THE ANALYSIS OF OPTICAL MICROSCOPY AND SCANNING ELECTRON IT IS POSSIBLE TO VERIFY THAT THE TREATMENT PROVIDED A MORE HOMOGENEOUS MICROSTRUCTURE IN THE MATERIAL. THROUGH THE X-RAY DIFFRACTION ANALYZES IT WAS ALSO POSSIBLE TO IDENTIFY THE PRESENT PHASES, WHICH AFTER ANNEALING ARE SIMILAR.
Palavras-chave
NiTi Alloys; Highly Ni NiTi Alloy; Annealing; Vacuum Arc Remelting.
NiTi Alloys; Highly Ni NiTi Alloy; Annealing; Vacuum Arc Remelting.
Como citar
Castro, Juliana Diniz e;
Casanova, Andrey de Moraes Barcelos;
Teixeira, Rodolfo da Silva;
Sénéchal, Naiara Vieira Le;
Ferrão, Thiago Henrique Fernandes Dias;
Rodrigues, Patrícia Freitas;
Paula, Andersan dos Santos.
ANNEALING EFFECTS IN HIGHLY NI NITI ALLOY INGOTS MELTED VIA VAR
,
p. 496-506.
In: 75° Congresso Anual da ABM,
São Paulo,
2022.
ISSN: 2594-5327
, DOI 10.5151/2594-5327-34604
