Influence of Growth Rate and Magnetic Field on Microstructure and Properties of Directionally Solidified Ag-Cu Eutectic Alloy.

Materials (Basel, Switzerland) · 2016 · Mixed · Insufficient evidence

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MixedInsufficient evidencePaper 2860

Study snapshot

PublicationMaterials (Basel, Switzerland) · 2016

Study typeengineering

Reported directionMixed

Evidence ratingInsufficient

Abstract

We report the influence of growth rate and external magnetic field on the eutectic lamellar spacing and properties of directionally-solidified Ag-Cu eutectic alloys. The results indicated that the relationship between the lamellar spacing of directionally-solidified Ag-Cu alloys and the growth rate matched the prediction of the Jackson-Hunt model, and the constant was 5.8 µm³/s. The increasing external magnetic field during solidification tilted the growth direction of the lamellar eutectics, and coarsened the eutectic lamellar spacing. These decreased the microhardness and strength of Ag-Cu alloys, but increased their electrical conductivity. The competitive strengthening contributions between the refinement of the eutectic lamellar spacing and the change in growth direction of the eutectics resulted in higher strength in the as-rolled sample with a 0.8 T magnetic field than with other samples, which was confirmed from higher relieved deformation energy using differential scanning calorimetry.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering

Effect directionmixed

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

In directionally solidified Ag-Cu eutectic alloys, increasing external magnetic field during solidification tilted the growth direction of lamellar eutectics and coarsened eutectic lamellar spacing. These changes decreased microhardness and strength but increased electrical conductivity. An as-rolled sample with a 0.8 T magnetic field showed higher strength than other samples, supported by higher relieved deformation energy on differential scanning calorimetry.

Outcomes measured

eutectic lamellar spacing
growth direction/tilting of lamellar eutectics
microhardness
strength
electrical conductivity
relieved deformation energy (differential scanning calorimetry)

Limitations

Magnetic field frequency/waveform not described (only field strength mentioned).
No sample size or detailed experimental design information provided in the abstract.
Findings are for material microstructure/properties; no biological/health outcomes assessed.

View raw extracted JSON

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  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "external magnetic field during solidification",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "eutectic lamellar spacing",
    "growth direction/tilting of lamellar eutectics",
    "microhardness",
    "strength",
    "electrical conductivity",
    "relieved deformation energy (differential scanning calorimetry)"
  ],
  "main_findings": "In directionally solidified Ag-Cu eutectic alloys, increasing external magnetic field during solidification tilted the growth direction of lamellar eutectics and coarsened eutectic lamellar spacing. These changes decreased microhardness and strength but increased electrical conductivity. An as-rolled sample with a 0.8 T magnetic field showed higher strength than other samples, supported by higher relieved deformation energy on differential scanning calorimetry.",
  "effect_direction": "mixed",
  "limitations": [
    "Magnetic field frequency/waveform not described (only field strength mentioned).",
    "No sample size or detailed experimental design information provided in the abstract.",
    "Findings are for material microstructure/properties; no biological/health outcomes assessed."
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "Ag-Cu eutectic alloy",
    "directional solidification",
    "growth rate",
    "external magnetic field",
    "lamellar spacing",
    "microhardness",
    "strength",
    "electrical conductivity",
    "Jackson-Hunt model",
    "differential scanning calorimetry"
  ],
  "suggested_hubs": [
    {
      "slug": "engineering-materials-processing",
      "weight": 0.9,
      "reason": "Study examines effects of an external magnetic field (0.8 T mentioned) on alloy solidification microstructure and properties."
    }
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}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.3390/ma9070569
PubMed: 28773691

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