Spatial characterization of the thermal-induced phase transformation throughout as-deposited additive manufactured NiTi bulk builds

Research output: Contribution to journalArticle

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Abstract

Transformation temperatures in NiTi shape memory alloys fabricated by laser based directed energy deposition with substrate heating were measured via differential scanning calorimetry. Elementally blended Ni and Ti powders produced Ni-poor (Ti53.1Ni46.9 at.%) and Ni-rich (Ni52.4Ti47.6 at.%) builds. Build volumes approaching three times the largest to date were fabricated, and specimens were extracted at selected locations to spatially resolve temperatures. Measurements were equivalent throughout as-deposited builds, and the dependence on Ni concentration corresponded to observations for conventionally processed alloys.

Original languageEnglish (US)
Pages (from-to)56-59
Number of pages4
JournalScripta Materialia
Volume101
DOIs
StatePublished - May 1 2015

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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