Comparison of Cu-Al-Ni-Mn-Zr shape memory alloy prepared by selective laser melting and conventional powder metallurgy

Autor(es)

Gera, Dennis ^{[1, 2]} ; Santos, Jonadabe ^{[1, 2]} ; Kiminami, Claudio S. ^{[1, 2]} ; Gargarella, Piter ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Postgrad Program Mat Sci & Engn, Sao Carlos - Brazil

^[2] Univ Fed Sao Carlos, Mat Engn Dept, R Washington Luis, Km 235, SP 310, Sao Carlos - Brazil

• Tipo de documento: Artigo Científico
• Fonte: TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA; v. 30, n. 12, p. 3322-3332, DEC 2020.
• Citações Web of Science: 0

Resumo

This work aimed to investigate and critically analyze the differences in microstructural features and thermal stability of Cu-11.3Al-3.2Ni-3.0Mn-0.5Zr shape memory alloy processed by selective laser melting (SLM) and conventional powder metallurgy. PM specimens were produced by sintering 106-180 mu m pre-alloyed powders under an argon atmosphere at 1060 degrees C without secondary operations. SLM specimens were consolidated through melting 32-106 mu m pre-alloyed powders on a Cu-10Sn substrate. Mechanical properties were measured through Vickers hardness testing. Differential scanning calorimetry was conducted to assess the martensitic transformation temperatures. X-ray diffraction patterns were collected to identify the metallurgical phases. Optical and scanning electron microscopy was used to analyze the microstructural features. beta(1)' martensite was found, irrespective of the processing route, although coarser martensitic variants were present in PM-specimens. In conventional powder metallurgy samples, intergranular eutectoid constituents and stabilized austenite also formed at room temperature. PM-specimens showed similar average hardness values to the SLM-specimens, albeit with high standard deviation linked to the porosity. The specimens processed by SLM showed reversible martensitic transformation (T-0 =171 degrees C). PM-processed specimens did not show shape memory effects. (AU)

• Processo FAPESP: 17/27031-4 - Influência de parâmetros de processo nas características metalúrgicas de peças fabricadas por manufatura aditiva
• Beneficiário: Piter Gargarella
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 13/05987-8 - Processamento e caracterização de ligas metálicas amorfas, metaestáveis e nano-estruturadas
• Beneficiário: Claudio Shyinti Kiminami
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/00583-4 - Processamento da liga com memória de forma Cu-11.8Al-3.2Ni-3Mn-0,5Zr através da metalurgia do pó
• Beneficiário: Dennis Balbino Gera
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica