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α-SiAION: Development and machining test on gray cast iron
(2008-12-01)
The α-SiAlON ceramic cutting tool insert is developed. Silicon nitride and additives powders are pressed and sintered in the form of cutting tool inserts at temperature of 1900 °C. The physics and mechanical properties of ...
Comparative study of two commercially pure titanium casting methods
(Faculdade De Odontologia De Bauru - USP, 2010)
The interest in using titanium to fabricate removable partial denture (RPD) frameworks has increased, but there are few studies evaluating the effects of casting methods on clasp behavior. OBJECTIVE: This study compared ...
Comparative study on turning CI and CGI using silicon nitride cutting tools
(2008-12-01)
There has been a great interest for improving the machining of cast iron materials in the automotive and other industries. Comparative studies for tool used to machine grey cast iron (CI) and compacted graphite iron (CGI) ...
Comparative study on turning CI and CGI using silicon nitride cutting tools
(2008-12-01)
There has been a great interest for improving the machining of cast iron materials in the automotive and other industries. Comparative studies for tool used to machine grey cast iron (CI) and compacted graphite iron (CGI) ...
Quantification of casting sking in ductile and compacted graphite irons and its effect on tensile properties
(Springer, 2009-08)
The mechanical properties of ductile iron (DI) and compacted graphite iron (CGI) are measured and reported on standard machined specimens (as per ASTM). However, most castings retain most of the as-cast surface. This surface ...
Analytical Functions Describing Solidification of Gray Cast Iron Based on Thermodynamic Calculations
(INTEMA - UNMdP-CONICET, 2014)
Morphological caste differences in the neotropical swarm-founding polistine wasp, Brachygastra lecheguana (Hymenoptera : Vespidae, Polistinae, Epiponini)
(California State University, 2000-01-01)
Morphological caste differences and ovary conditions were analyzed in colony of Brachygastra lecheguana. The results indicate the presence of individuals with ovary development but uninseminated (intermediates). In addition, ...
Castes in the Neotropical Social Wasp Leipomeles dorsata (Fabricius) (Hymenoptera: Vespidae): a Window for Workers Achieving a New Status in the Colony
(Entomological Soc Brasil, 2010-07-01)
Morphometric studies performed in several species of Neotropical social wasps from the tribe Epiponini showed that in some species there are marked differences between castes, while other species present highly distinct ...
The caste system of Coptotermes gestroi (Isoptera: Rhinotermitidae)
(2005-08-04)
Coptotermes gestroi is an oriental species introduced to Brazil and considered, in the São Paulo State area, one of the most economically important pests. Although there are a few works concerning the basic biology of this ...
Non-allometric caste differences in Agelaia vicina (Hymenoptera, Vespidae, Epiponini)
(1998-12-01)
Non-allometric and clear-cut caste dimorphism were found in two colonies of the social wasp Agelaia vicina. Such type of allometry was previously recorded in the Epiponini and its origin is pre-imaginally determined as in ...