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Desgaste e vida de ferramenta no torneamento de uma liga à base de níquel
(Universidade Federal de São Carlos, 2023-07-10) Marcasso, Wanderson; Antonialli, Armando Ítalo Sette; https://lattes.cnpq.br/4367459395417045; https://orcid.org/0000-0002-3466-0416; https://lattes.cnpq.br/4691506409218670; https://orcid.org/0009-0008-3514-5003
In the field of metal alloy machining, materials predominantly composed of nickel alloys, with a focus on Inconel 718, present notable challenges, stemming from the interplay of intense cutting forces and extreme temperatures in the cutting zone. This combination triggers accelerated wear on cutting tools. This study proposes a meticulous investigation of standardized turning parameters, using robust and widely recognized criteria to discern their relevance and optimization potential. We centered our analysis on multifaceted wear modes, encompassing flank wear, crater wear, and the emerging formation of built-up edge, during the machining process, using meticulously selected commercial inserts for this purpose. The application of the Taylor model was chosen, an approach revered both in the academic world and in the industrial sector, aiming for a discerning evaluation of the wear of cutting tools and interpreting their intrinsic behavior in machining nickel alloys. The research conclusions revealed eminent findings regarding the correlation between cutting parameters and tool wear, laying solid groundwork for future strategies aimed at extending tool durability and refining the quality of the final machined product.
Efeitos de diferentes tipos de entrevista na acurácia de relato verbal de crianças
(Universidade Federal de São Carlos, 2023-07-10) Faria, Camila de Paula; Cortez, Mariéle Diniz; https://lattes.cnpq.br/7927746584626515; https://lattes.cnpq.br/7005118109610359
Studies on verbal and non-verbal correspondence can be considered of great importance since reporting has a determining role in various contexts. This study focused on the forensic context, more specifically, on investigative interviews with children, and replicated the study of Sparling et al. (2011) with the purpose of investigating, from a behavioral perspective, the effects of different types of interviews (suggestive questions, repeated questions, and questions with co-witness information) on children's verbal report accuracy. Four children aged between seven and nine years participated. Children were exposed to a baseline condition, which evaluated the accuracy of the report using in a closed-question interview (“yes” or “no” answers), without the use of any of the interview techniques employed in this study. Children were then exposed to three other conditions, involving different types of interviews (suggestive questions; repeated questions and questions with information from co-witnesses) conducted by a female interviewer. A mixed design of non-concurrent multiple baseline across participants and adapted alternating treatment was employed. The results showed transient effects of interview types and variability among participants. The lowest accuracy rates were observed in P1 for questions with co-witness information; in P2 for suggestive questions and in P3 for repeated questions. P4 participant remained showing high rates of accurate responses in all experimental conditions. In general, these results replicated the findings of Sparling et al. (2011), indicating that the effect of the type of interview may vary for each individual. The need for studies with single subject designs and the possible effects of the online implementation of the procedure were discussed.