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The Hotter Powder Bed Traded Martensite for Ductility
Electron-beam printing produced a titanium structure that combined 1,120-megapascal yield strength with 11.1 percent elongation.
Summary
Electron-beam printing produced a titanium structure that combined 1,120-megapascal yield strength with 11.1 percent elongation.
A comparison of Ti-6Al-4V made by laser and electron-beam powder-bed fusion found acicular martensite and high residual stress in the laser-built specimens. Electron-beam preheating at 740 degrees Celsius slowed cooling and produced a coarser alpha-plus-beta lamellar structure; together with 0.24 percent oxygen, it reached 1,120 plus or minus 12 megapascals in yield strength and 11.1 plus or minus 1.3 percent elongation. A deformation-induced phase change also helped accommodate strain. The finding concerns tested specimens, not every machine or production geometry.
Why it matters
Electron-beam printing produced a titanium structure that combined 1,120-megapascal yield strength with 11.1 percent elongation.
Limits and context
- The finding concerns tested specimens, not every machine or production geometry.
Key claims
Electron-beam printing produced a titanium structure that combined 1,120-megapascal yield strength with 11.1 percent elongation.
Qualification: The finding concerns tested specimens, not every machine or production geometry.
Evidence: source-2026-08-04-008
Sources
- Materials: laser and electron-beam powder-bed titaniumMDPI · secondary reporting
Corrections
No corrections have been recorded for this story.