Powder-size driven facile microstructure control in powder-fusion metal additive manufacturing processes

被引：32

作者：

Chandra, Shubham ^{[1
]}

Wang, Chengcheng ^{[1
]}

Tor, Shu Beng ^{[2
]}

Ramamurty, Upadrasta ^{[2
,3
]}

Tan, Xipeng ^{[4
,5
]}

机构：

[1] Nanyang Technol Univ, Singapore Ctr Printing 3D, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore

[2] Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore

[3] Agcy Sci Technol & Res, Inst Mat Res & Engn, Singapore 138634, Singapore

[4] Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1, Singapore 117575, Singapore

[5] Natl Univ Singapore, Dept Mat Sci & Engn, 9 Engn Dr 1, Singapore 117575, Singapore

来源：

NATURE COMMUNICATIONS | 2024年 / 15卷 / 01期

关键词：

MECHANICAL-PROPERTIES; GRAIN-STRUCTURE; SINGLE-CRYSTAL; DEPOSITION; BED; ORIENTATION; SUPERALLOYS; PARTICLE; COLUMNAR; GROWTH;

D O I：

10.1038/s41467-024-47257-w

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Microstructure control in metal additive manufacturing is highly desirable for superior and bespoke mechanical performance. Engineering the columnar-to-equiaxed transition during rapid solidification in the additive manufacturing process is crucial for its technological advancement. Here, we report a powder-size driven melt pool engineering approach, demonstrating facile and large-scale control in the grain morphology by triggering a counterintuitive response of powder size to the additively manufactured 316 L stainless steel microstructure. We obtain coarse-grained (>100 mu m) or near-monocrystalline microstructure using fine powders and near-equiaxed, fine-grained (<10 mu m) microstructure using coarse powders. This approach shows resourceful adaptability to directed energy deposition and powder-bed fusion with no added cost, where the particle-size dependent powder-flow preheating effects and powder-bed thermophysical properties drive the microstructural variations. This work presents a pathway for leveraging feedstock particle size distribution towards more controllable, cost-effective, and sustainable metal additive manufacturing.

引用

页数：14

共 52 条

[21] Effects of processing on microstructure and mechanical properties of a titanium alloy (Ti-6Al-4V) fabricated using electron beam melting (EBM), Part 2: Energy input, orientation, and location [J].