微观结构
极限抗拉强度
延伸率
均质化(气候)
材料科学
钛合金
冶金
硬化(计算)
融合
原位
合金
拉伸试验
复合材料
化学
有机化学
哲学
生物多样性
生物
语言学
图层(电子)
生态学
作者
Tianlong Zhang,Zhenghua Huang,Tao Yang,H.J. Kong,Junhua Luan,Anding Wang,Dong Wang,Way Kuo,Yunzhi Wang,Chang Liu
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2021-10-22
卷期号:374 (6566): 478-482
被引量:158
标识
DOI:10.1126/science.abj3770
摘要
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.
科研通智能强力驱动
Strongly Powered by AbleSci AI