TY - JOUR
T1 - Effects of friction stir processing on strength and ductility of laser directed energy deposited AerMet100 steel
AU - Lu, Jiayang
AU - Li, Wenya
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/11/6
Y1 - 2023/11/6
N2 - Due to thick columnar crystals and obvious pores as typical defects, the mechanical properties of AerMet100 steel fabricated by laser directed energy deposition (LDED) are adversely affected, limiting its applicability in aerospace industry. Aiming at both defects, we developed friction stir processing as a post treatment to strengthen the LDEDed specimens, with two following advantages: (i) it significantly reduced the porosity and homogenized the microstructure, and the average grain size was decreased from 4.75 μm to 1.24 μm; and (ii) it significantly enhanced room temperature tensile properties by eliminating the pores, leading to the fact that the elongation increased from 3.51% to 7.38%, and the ultimate tensile strength increased from 1458 MPa to 1561 MPa. Therefore, FSP generated a simultaneous improvement in both the strength and elongation of the LDEDed AerMet100 steel.
AB - Due to thick columnar crystals and obvious pores as typical defects, the mechanical properties of AerMet100 steel fabricated by laser directed energy deposition (LDED) are adversely affected, limiting its applicability in aerospace industry. Aiming at both defects, we developed friction stir processing as a post treatment to strengthen the LDEDed specimens, with two following advantages: (i) it significantly reduced the porosity and homogenized the microstructure, and the average grain size was decreased from 4.75 μm to 1.24 μm; and (ii) it significantly enhanced room temperature tensile properties by eliminating the pores, leading to the fact that the elongation increased from 3.51% to 7.38%, and the ultimate tensile strength increased from 1458 MPa to 1561 MPa. Therefore, FSP generated a simultaneous improvement in both the strength and elongation of the LDEDed AerMet100 steel.
KW - AerMet100 steel
KW - Ductility
KW - Friction stir processing
KW - Laser directed energy deposition
KW - Strength
UR - http://www.scopus.com/inward/record.url?scp=85172421054&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2023.145740
DO - 10.1016/j.msea.2023.145740
M3 - 文章
AN - SCOPUS:85172421054
SN - 0921-5093
VL - 887
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
M1 - 145740
ER -