Experimental study on additive manufactured 304L stainless steel tubular sections: Material properties and cross-sectional behavior

Feng，Ran1; Tang，Jing Pu1; Quach，Wai Meng2; Yan，Ming3; Zhao，Jing2

2022-12-15

10.1016/j.engstruct.2022.115093

ENGINEERING STRUCTURES   Impact Factor & Quartile

0141-0296

1873-7323

This paper presents an experimental investigation on the material properties and cross-sectional behavior of 304L stainless steel tubular sections additively manufactured using selective laser melting (SLM). A total of 76 tensile coupons, 76 hardness test specimens, and 25 stub columns were fabricated from 304L stainless steel powders by the SLM technique. Tension coupon tests and hardness tests were conducted to determine the mechanical properties. Residual stresses and local geometric imperfections of the stub columns were measured. The effects of coupon specimen orientations, thicknesses, and annealing conditions on the measured material properties were explored. In addition, the failure modes, ultimate load-carrying capacities and structural responses of the stub columns with four different cross-sections under axial compression were obtained and analyzed to evaluate the cross-sectional behavior. The test results of ultimate strengths were compared with the predictions calculated from the current design methods. The test results showed that the tensile strength of the coupon perpendicular to the building direction was higher than that of the coupon parallel to the building direction. Moreover, the tensile strength of the coupon increased with the increase of the coupon thickness. Considering the cross-sectional behavior, the square hollow section (SHS) and circular hollow section (CHS) had greater cross-sectional axial capacities than the rectangular hollow section (RHS) and elliptical hollow section (EHS), respectively. The introduction of a single stiffener in SHS and CHS reduced the load-carrying capacities to a certain extent.

304L stainless steel Additive manufacturing (AM) Selective laser melting (SLM) Stub column Tubular section

SCI

English

Others

National Natural Science Foundation of China[52178131] ; Shenzhen Science and Technology Program[GXWD20201230155427003-20200804174353001] ; Science and Technology Development Fund, Macau SAR["129/2014/A3","073/2015/A2"]

Engineering

Engineering, Civil

WOS:000877006200003

ELSEVIER SCI LTD

ENGINEERING

2-s2.0-85139847974

Scopus

1.School of Civil and Environmental Engineering,Harbin Institute of Technology,Shenzhen,518055,China
2.Department of Civil and Environmental Engineering,University of Macau,Macau,China
3.Department of Materials Science and Engineering,Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials,Southern University of Science and Technology,Shenzhen,518055,China

Feng，Ran,Tang，Jing Pu,Quach，Wai Meng,et al. Experimental study on additive manufactured 304L stainless steel tubular sections: Material properties and cross-sectional behavior[J]. ENGINEERING STRUCTURES,2022,273.

Feng，Ran,Tang，Jing Pu,Quach，Wai Meng,Yan，Ming,&Zhao，Jing.(2022).Experimental study on additive manufactured 304L stainless steel tubular sections: Material properties and cross-sectional behavior.ENGINEERING STRUCTURES,273.

Feng，Ran,et al."Experimental study on additive manufactured 304L stainless steel tubular sections: Material properties and cross-sectional behavior".ENGINEERING STRUCTURES 273(2022).