Scholarlink

<p>The Ti-24Nb-4Zr-8Sn (Ti2448) alloy is made using laser powder bed fusion (LPBF). Optical micrographs show significant densification with few pores. X-ray diffraction analysis detected α’’ martensite formation during LPBF and confirmed the β → α’’ transformation in tensile testing. EBSD-phase maps indicated β phase presence alongside approximately 2% α’’ martensite after LPBF. Most α’’ martensite grains belong to the 2nd, 3rd, and 4th variants, with no 1st, 5th, or 6th variant grains found. Potentiodynamic polarization tests indicated low corrosion current density and potential. Microarchitectured samples with a body-centered cubic (BCC) structure can endure greater compressive forces than those with a face-centered cubic (FCC) structure. BCC samples exhibit more compressive deformation compared to FCC samples. Peak yielding force and strength of both FCC and BCC samples increase with higher strain rates. BCC samples show shear failure, while FCC samples experience strut fracture and buckling. BCC samples absorb more energy per gram than FCC samples.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of Strain Rate on the Deformation Behavior and Energy Absorption Characteristics of LPBF-Processed Ti2448 Microarchitectured Lattice Structures

  • 期刊论文

  • 发表日期：

    2025年7月28日

查看全文
  • Koustav Ghosh,
  • Dennis Milaege,
  • Paul Steinmeier,
  • Mirko Schaper,
  • Kay-Peter Hoyer,
  • Sudipta Pramanik

摘要

The Ti-24Nb-4Zr-8Sn (Ti2448) alloy is made using laser powder bed fusion (LPBF). Optical micrographs show significant densification with few pores. X-ray diffraction analysis detected α’’ martensite formation during LPBF and confirmed the β → α’’ transformation in tensile testing. EBSD-phase maps indicated β phase presence alongside approximately 2% α’’ martensite after LPBF. Most α’’ martensite grains belong to the 2nd, 3rd, and 4th variants, with no 1st, 5th, or 6th variant grains found. Potentiodynamic polarization tests indicated low corrosion current density and potential. Microarchitectured samples with a body-centered cubic (BCC) structure can endure greater compressive forces than those with a face-centered cubic (FCC) structure. BCC samples exhibit more compressive deformation compared to FCC samples. Peak yielding force and strength of both FCC and BCC samples increase with higher strain rates. BCC samples show shear failure, while FCC samples experience strut fracture and buckling. BCC samples absorb more energy per gram than FCC samples.