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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cellular/dendritic transition, dendritic growth and microhardness in directionally solidified monophasic Sn-2%Sb alloy

Full text
Author(s):
Rocha, O. L. [1, 2] ; Costa, T. A. [1] ; Dias, M. [3] ; Garcia, A. [3]
Total Authors: 4
Affiliation:
[1] Fed Inst Educ Sci & Technol IFPA, BR-66093020 Belem, Para - Brazil
[2] Fed Univ Para UFPA, Fac Mech Engn, BR-66075110 Belem, Para - Brazil
[3] Univ Estadual Campinas, UNICAMP, Dept Mfg & Mat Engn, BR-13083860 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA; v. 28, n. 8, p. 1679-1686, AUG 2018.
Web of Science Citations: 2
Abstract

Horizontal directional solidification experiments were carried out with a monophasic Sn-2%Sb (mass fraction) alloy to analyze the influence of solidification thermal parameters on the morphology and length scale of the microstructure. Continuous temperature measurements were made during solidification at different positions along the length of the casting and these temperature data were used to determine solidification thermal parameters, including the growth rate (V-L) and the cooling rate (T-R). High cooling rate cells and dendrites are shown to characterize the microstructure in different regions of the casting, with a reverse dendrite-to-cell transition occurring for T-R>5.0 K/s. Cellular (lambda(c)) and primary dendrite arm spacings (lambda(1)) are determined along the length of the directionally-solidified casting. Experimental growth laws relating lambda(c) and lambda(2) to V-L and T-R are proposed, and a comparative analysis with results from a vertical upward directional solidification experiment is carried out. The influence of morphology and length scale of the microstructure on microhardness is also analyzed. (AU)

FAPESP's process: 16/18186-1 - Microstructural evolution and mechanical and wear resistances of ternary Al-Bi-Si and Al-Bi-Ni alloys unidirectionally solidified
Grantee:José Marcelino da Silva Dias Filho
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/15158-0 - Characterization of microstructure and properties in the evaluation of alloys for thermal interface contact
Grantee:Amauri Garcia
Support Opportunities: Regular Research Grants