Interface engineering of functionally graded steel-steel composites by laser powder bed fusion. (April 2021)

• Record Type: Journal Article
• Authors: Nadimpalli, Venkata K.; Mishin, Oleg V.; Lin, Meimei; Christiansen, Thomas L.; Pedersen, David B.; Zhang, Yubin
• Is Part Of: Manufacturing letters. Volume 28(2021)
• Page Start: 46
• Page End: 49
• Publication Date: 2021-04
• Subjects: Additive manufacturing -- Compositionally-graded materials -- Functionally-graded materials -- Steel-steel composites -- High-carbon martensitic steels; Manufacturing industries -- Periodicals; Production engineering -- Periodicals; Manufacturing industries; Periodicals; 670
• DOI: 10.1016/j.mfglet.2021.03.003
• Languages: English
• ISSNs: 2213-8463

Abstract

Abstract: In this study, the manufacturability of new types of steel-steel composites on an open-architecture laser powder bed fusion (LPBF) system is demonstrated. A hard martensitic stainless tool steel 440C and a soft austenitic stainless steel 316L are combined in a "multi-material" component with discrete and continuous material gradients. Interface engineering is accomplished through a heat treatment to induce phase transformation. A designed distribution of carbides/carbonitrides and local martensitic transformation lead to controllable variations in hardness. Hence, the compositionally-graded component is converted into a functionally-graded composite. The concept showcases the potential for selectively engineering the properties of steel-steel additively manufactured composites.