Development of Fe-Mn-Si-Cr-Ni shape memory alloy with ultrahigh mechanical properties and large recovery strain by laser powder bed fusion

Yang，Xiao1,2; Cheng，Lijin2; Peng，Huabei3; Qian，Bingnan4; Yang，Lei5; Shi，Yunsong6; Chen，Annan1; Zhang，Zhengyan2; Zhao，Libin2; Hu，Ning2; Yan，Chunze1; Shi，Yusheng1

2023-07-01

10.1016/j.jmst.2022.11.046

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY   Impact Factor & Quartile

1005-0302

This work systematically studied the effect of volumetric energy density E on the densification, microstructures, tensile mechanical properties, and shape memory performance of a Fe-Mn-Si-Cr-Ni shape memory alloy (SMA) fabricated by laser powder bed fusion (L-PBF). An E of 90–265 J/mm is suggested to fabricate the Fe-Mn-Si-Cr-Ni SMA with minor metallurgical defects and a high relative density of above 99%. The increase in E can promote the formation of the primary γ austenite and the solid phase transformation from the primary δ ferrite to the γ austenite, which helps to achieve a nearly complete γ austenitic microstructure. The increase in E also contributes to fabricating the Fe-Mn-Si-Cr-Ni SMA with superior comprehensive mechanical properties and shape memory performance by L-PBF. The Fe-Mn-Si-Cr-Ni SMA with a combination of good ductility of around 30%, high yield strength of above 480 MPa, an ultrahigh ultimate tensile strength of above 1 GPa, and large recovery strain of about 6% was manufactured by L-PBF under a high E of 222–250 J/mm. The good shape memory effect, excellent comprehensive mechanical properties, and low cost of Fe-Mn-Si-Cr-Ni SMAs, as well as the outstanding ability to fabricate complex structures of L-PBF technology, provide a solid foundation for the design and fabrication of novel intelligent structures.

Fe-Mn-Si-based alloys Laser powder bed fusion Mechanical property Microstructure Shape memory alloys

SCI

English

Others

WOS:000942559200001

MATERIALS SCIENCE

2-s2.0-85148700240

Scopus

1.State Key Laboratory of Materials Processing and Die and Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,430074,China
2.School of Mechanical Engineering,Hebei University of Technology,Tianjin,300401,China
3.School of Mechanical Engineering,Sichuan University,Chengdu,610065,China
4.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan,430070,China
6.Department of Orthopaedics,Union Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan,430022,China

Yang，Xiao,Cheng，Lijin,Peng，Huabei,et al. Development of Fe-Mn-Si-Cr-Ni shape memory alloy with ultrahigh mechanical properties and large recovery strain by laser powder bed fusion[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,150:201-216.

Yang，Xiao.,Cheng，Lijin.,Peng，Huabei.,Qian，Bingnan.,Yang，Lei.,...&Shi，Yusheng.(2023).Development of Fe-Mn-Si-Cr-Ni shape memory alloy with ultrahigh mechanical properties and large recovery strain by laser powder bed fusion.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,150,201-216.

Yang，Xiao,et al."Development of Fe-Mn-Si-Cr-Ni shape memory alloy with ultrahigh mechanical properties and large recovery strain by laser powder bed fusion".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 150(2023):201-216.