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Effect of shot peening on corrosion resistance of additive manufactured 17-4PH steel

Aleksander Świetlicki

Aleksander Świetlicki

Department of Materials Engineering, Faculty of Mechanical Engineering, Lublin University of TechnologyLublin, Poland
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Świetlicki, Aleksander
, 
Mariusz Walczak

Mariusz Walczak

Department of Materials Engineering, Faculty of Mechanical Engineering, Lublin University of TechnologyLublin, Poland
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Walczak, Mariusz
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Mirosław Szala

Mirosław Szala

Department of Materials Engineering, Faculty of Mechanical Engineering, Lublin University of TechnologyLublin, Poland
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Szala, Mirosław
  
03. März 2023
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Online veröffentlicht: 03. März 2023
Seitenbereich: 135 - 151
Eingereicht: 10. Okt. 2022
Akzeptiert: 05. Jan. 2023
DOI: https://doi.org/10.2478/msp-2022-0038
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© 2022 Aleksander Świetlicki et al., published by Sciendo
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Fig. 1

Schematic of changes within the surface layer of the material following fabrication and after peening, compiled on the basis of [13]
Schematic of changes within the surface layer of the material following fabrication and after peening, compiled on the basis of [13]

Fig. 2

17-PH: (A) DMLS printed specimen's texture after SP; (B) EOS GP1. DMLS, direct metal laser sintering; SP, shot peening
17-PH: (A) DMLS printed specimen's texture after SP; (B) EOS GP1. DMLS, direct metal laser sintering; SP, shot peening

Fig. 3

Hardness profiles of SP specimens. SP, shot peening
Hardness profiles of SP specimens. SP, shot peening

Fig. 4

Surface hardness of un-peened and shot peened 17-4PH
Surface hardness of un-peened and shot peened 17-4PH

Fig. 5

Roughness parameters (A) Ra, (B) Rq, (C) Rt, (D) Rv, (E) Rp, and (F) Rz
Roughness parameters (A) Ra, (B) Rq, (C) Rt, (D) Rv, (E) Rp, and (F) Rz

Fig. 6

The cross section of specimens showing modified surface layer after SP: (A) reference; (B) ceramic; (C) glass; (D) steel. SP, shot peening
The cross section of specimens showing modified surface layer after SP: (A) reference; (B) ceramic; (C) glass; (D) steel. SP, shot peening

Fig. 7

Phase compositions of as-printed and shot peened samples, XRD. XRD, X-ray diffractometer
Phase compositions of as-printed and shot peened samples, XRD. XRD, X-ray diffractometer

Fig. 8

Surface morphology of 17-4PH steel: (A) reference sample, SEM-topo mode; (B) reference, SEM-BSD mode; (C) ceramic, SEM-topo; (D) ceramic, BSD mode; (E) glass, SEM-topo; (F) glass, BSD mode; (G) steel SEM-topo; (H) steel, BSD mode. BSD, backscattered electrons; SEM, scanning electron microscopy
Surface morphology of 17-4PH steel: (A) reference sample, SEM-topo mode; (B) reference, SEM-BSD mode; (C) ceramic, SEM-topo; (D) ceramic, BSD mode; (E) glass, SEM-topo; (F) glass, BSD mode; (G) steel SEM-topo; (H) steel, BSD mode. BSD, backscattered electrons; SEM, scanning electron microscopy

Fig. 9

Chemical composition spot analysis: (A) ceramic, (B) glass, (C) steel, SEM-EDS. EDS, energy dispersive X-ray spectroscopy; SEM, scanning electron microscopy
Chemical composition spot analysis: (A) ceramic, (B) glass, (C) steel, SEM-EDS. EDS, energy dispersive X-ray spectroscopy; SEM, scanning electron microscopy

Fig. 10

Potentiodynamic polarization curves in 3.5% NaCl solution
Potentiodynamic polarization curves in 3.5% NaCl solution

Results of α-martensite crystallite size of un-penned and shoot penned 17-4PH steel using the ceramic, glass, and steel peening beads

Specimen Position, [°2Th.] Crystallite size [nm]
Ref. 44.53 (3) 25
Ceramic 44.36 (2) 16
Glass 44.40 (2) 15
Steel 44.37 (2) 19

Electrochemical parameters of 17-4PH at different surface conditions in the 3_5 wt% NaCl solution

Sample Icorr (μA/cm2) Ecorr (VSCE) Epit (VSCE)
Ref. 0.799 ± 0.011 −0.214 ± 0.015 0.343 ± 0.018
Ceramic 0.660 ± 0.009 −0.207 ± 0.012 0.165 ± 0.015
Glass 0.227 ± 0.007 −0.180 ± 0.011 0.259 ± 0.021
Steel 0.019 ± 0.008 −0.054 ± 0.012 0.462 ± 0.014

Chemical composition in accordance with manufacturer data and ASTM A564

C Cr Ni Cu Mn Si Mo Nb Fe
17-4PH as-fabricated 0.04 15.85 4.92 4.79 0.67 0.71 0.12 0.27 Bal.
GP1 Wt. [%] 0.01 15.8 4.02 3.9 0.7 0.7 0.4 0.29 Bal.
GP1 powder (EOS declaration) <0.07 15–17.5 3–5 3–5 <1 <1 <0.5 0.15–0.45 Bal.
EN10088-1 <0.07 15–17 3–5 3–5 <1.5 <0.7 <0.6 5*C–0.45 Bal.
ASTM A564 <0.07 15–17.5 3–5 3–5 <1 1 <0.5 0.15–0.45 Bal.

Specimen's designations and peening characteristics

Peening medium Size of particles [μm] Time [min] Peening pressure [MPa] Chemical composition
Reference – – – –
Ceramic ∅125–250 1 0.3 ZrO2 60%–70%, SiO2 28%–33% Al2O3 < 10%
Glass beads ∅100–200 1 0.3 70% SiO2, 10% CaO, 15% Na2O + K2O, 5% MgO
Steel shots ∅400–900 1 0.3 Cr 16%–20%, Ni 7%–9%, Si 1.8%–2.2%, Mn 0.7%–1.2%, C 0.05%–0.02%, Fe-Bal.
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