Research of Atomization Phenomena in HPDC-Step 1 Feature of Gas Porosity Dispersion and Photography of Atomized Flow

Eitaro Koya, Masahiko Nakagawa, Shinya Kitagawa, Jun Ishimoto, Yoshikatsu Nakano, Naoya Ochiai

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

In recent years, studies have been conducted on the relationship between the J factor, which indicates flow of molten aluminum at the time of injection, and the quality of HPDC products. The flow of molten metal at a high J factor is referred to as "Atomized Flow." The authors and others conducted studies on the relationship between the J factor and the strength of HPDC products. An area exceeding 300MPa was found in the product produced at a high J factor corresponding to the "Atomized Flow." The defect was less in the above-mentioned position because the gas porosity was finely dispersed. Considering that the fine dispersion of gas porosity is related to the "Atomized Flow", pictures were taken to analyze "Atomized Flow." The molten aluminum was ejected into an open space at a high speed and the splashed conditions were photographed. From the images taken by the pulse laser permeation, the conditions of microscopic atomized flow were observed precisely. It has been revealed from the pictures that the molten aluminum is atomized at the injection nozzle (gate) at the time of high speed injection, as well as clarifying the procedures through which the atomization occurs in the HPDC.

Original languageEnglish
JournalSAE Technical Papers
Volume2018-April
DOIs
Publication statusPublished - 2018
Event2018 SAE World Congress Experience, WCX 2018 - Detroit, United States
Duration: 2018 Apr 102018 Apr 12

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

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