Cyclic plastic behavior of additively manufactured Ti-6Al-4V under uniaxial and multiaxial non-proportional loading

Stefano Bressan, Fumio Ogawa, Takamoto Itoh, Filippo Berto

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Cyclic plastic behavior of additively manufactured Ti-6Al-4V titanium alloy was experimentally investigated under non-proportional multiaxial cyclic loading. Four cylindrical hollow specimen types were fabricated using laser powder bed fusion (L-PBF). The typology of each specimen was defined by the orientation of the layers and application of a stress-relief heat treatment post production. Then, the specimens’ microstructures were analyzed. Stress–strain cyclic testing in the specimens’ plastic region resulted in near-equivalent curves for each fabricated specimen type. Fatigue tests evidenced that the fatigue life was similar regardless of heat-treatment and layer orientation. Hysteresis loops showed a higher energy absorption for the heat-treated components. Drastic softening has been detected in the majority of the tests and cracks initiating from internal voids, internal defects and surface could be observed.

本文言語English
ページ(範囲)155-164
ページ数10
ジャーナルInternational Journal of Fatigue
126
DOI
出版ステータスPublished - 2019 9
外部発表はい

ASJC Scopus subject areas

  • モデリングとシミュレーション
  • 材料科学(全般)
  • 材料力学
  • 機械工学
  • 産業および生産工学

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