In situ design of advanced titanium alloy with concentration modulations by additive manufacturing

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Zhenghua Huang
  • Junhua Luan
  • Anding Wang
  • Dong Wang
  • Yunzhi Wang

Detail(s)

Original languageEnglish
Pages (from-to)478-482
Journal / PublicationScience
Volume374
Issue number6566
Online published21 Oct 2021
Publication statusPublished - 22 Oct 2021

Abstract

Additive manufacturing is a revolutionary technology that offers a different pathway for material processing and design. However, innovations in either new materials or new processing technologies can seldom be successful without a synergistic combination. We demonstrate an in situ design approach to make alloys spatially modulated in concentration by using laser-powder bed fusion. We show that the partial homogenization of two dissimilar alloy melts—Ti-6Al-4V and a small amount of 316L stainless steel—allows us to produce micrometer-scale concentration modulations of the elements that are contained in 316L in the Ti-6Al-4V matrix. The corresponding phase stability modulation creates a fine scale–modulated β + α′ dual-phase microstructure that exhibits a progressive transformation-induced plasticity effect, which leads to a high tensile strength of ~1.3 gigapascals with a uniform elongation of ~9% and an excellent work-hardening capacity of >300 megapascals. This approach creates a pathway for concentration-modulated heterogeneous alloy design for structural and functional applications.

Citation Format(s)

In situ design of advanced titanium alloy with concentration modulations by additive manufacturing. / Zhang, Tianlong; Huang, Zhenghua; Yang, Tao; Kong, Haojie; Luan, Junhua; Wang, Anding; Wang, Dong; Kuo, Way; Wang, Yunzhi; Liu, Chain-Tsuan.

In: Science, Vol. 374, No. 6566, 22.10.2021, p. 478-482.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review