{
  "id": 69062,
  "title": "Effects of cooling rate on the biocorrosion, microstructure and mechanical properties of biomedical Mg-2Zn-0.5Sr-0.3Ca alloy",
  "url": "https://urgent.news/2026/08/03/effects-of-cooling-rate-on-the-biocorrosion-microstructure-and",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-03T00:00:00.000Z",
  "source": {
    "name": "Scientific Reports",
    "slug": "scientific-reports",
    "url": "https://www.nature.com/articles/s41598-026-65009-2"
  },
  "original_language": "en",
  "account": "The cooling rate significantly influences the microstructure, biocorrosion behavior and mechanical properties of the Mg-2Zn-0.5Sr-0.3Ca biomedical alloy. Both water-cooling copper mold casting (material I) and steel mold casting (material II) produce alloys composed of α-Mg, Mg17Sr2 and Ca2Mg6Zn3 phases. Material I, with the higher cooling rate, exhibits finer grain size and more evenly distributed secondary phases. This leads to an increase in ultimate tensile strength (UTS) from 159 ± 4 MPa to 159 ± 4 MPa, a rise in yield strength (YS) from 70 ± 3 MPa to 70 ± 3 MPa, and an improvement in fracture elongation from approximately 8.9% to 16.3%. However, material II demonstrates a lower corrosion current density (1.95 ± 0.12 µA·cm−2) and superior corrosion resistance. The additional secondary phases, coupled with the irregular grain boundaries resulting in more galvanic cells, may facilitate galvanic corrosion propagation. Material I shows a larger impedance value, which correlates well with the polarization curves and Bode phase angles. The study was conducted by researchers from the School of Metallurgy and Materials Engineering at Iran University of Science and Technology, with no external funding received.",
  "summary": "Scientific Reports, Published online: 03 August 2026; doi:10.1038/s41598-026-65009-2 Effects of cooling rate on the biocorrosion, microstructure and mechanical properties of biomedical Mg-2Zn-0.5Sr-0.3Ca alloy",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}