Estuary basin is a fertile area which has important role for sustaining many organisms from estuary and sea. Mould and other saprobic microorganisms have important role to decomposing organic material in estuary water. A study on diversity and abundance of mould inhabiting Muara Layang estuary sediment, Bangka Belitung Islands has not been conducted before. The objective of this study is to inv...

Process planning for the productive machining of complex shaped parts is a comprehensive activity where dynamic behaviour machine tool, workpiece and process setting has to be taken into account. The predictive process-oriented tool digital twin simulation enabling full control results with respect adjustment whole system process. paper defines describes four different levels such according its...

This paper addresses a semi-automated process of brokerage for a virtual organization of mould and die industries located in the south of Brazil called VIRFEBRAS. This process is represented by a multi-agent-based decision support system that helps a human-broker in the selection of the group of enterprises within VIRFEBRAS which better fits a given business opportunity. This decision is not au...

Abstract: structures in alloys. This method is based on pouring the melt through a small sized nozzle into a mould located at acertain height under the crucible. This simple method generates globular structures without using equipments such asimpellers, electromagnetic stirrers, ultrasonic probes and cooling slopes. Therefore it is cost effective. In the presentstudy, the effect of casting size...

17-4ph stainless steel is a martensitic precipitation hardening stainless steel that provides an outstandingcombination of high strength, good corrosion resistance, good mechanical properties, good toughness in both base metal and welds, and short time, low-temperature heat treatments that minimize warpage and scaling. this valuable alloy is widely used in the aerospace, nuclear, chemical, petr...

Abstract The importance of geometrical accuracy can never be overruled in dies and molds which governs the dimensional precision parts being manufactured. continuous use such tooling requires repair maintenance. Among different processes used to upkeep consistency tooling, machining is essentially required most cases. intricacy molds’ cavities electric discharge (EDM). However, EDM it challengi...

Electrical Discharge Machine (EDM) is one of the non-traditional machining processes. EDM process is based on thermoelectric energy between the work and an electrode. A pulse discharge occurs in a small gap between the work piece and the electrode and removes the unwanted material from the parent metal through melting and vaporization. The electrode and the work piece must have an electrical co...

In this paper, the straight flute end-milling cutter used for machining of Al-Si-Mg-Fe alloy work pieces was investigated. The machining processes could induce residual stresses that enhance greatly the performance of the machined component. Machining residual stresses correlate very closely with the cutting parameters. In the experiments, the residual stress on the surface of workpiece was mea...