Effects of shot peening parameters on gradient microstructure and mechanical properties of TRC AZ31

Jamalian, Maryam; Field, David P.

doi:10.1016/j.matchar.2018.12.001

Cited by 51 publications

(11 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several authors have shown how heterogeneous structures are obtained through severe plastic deformation techniques such as Equal Channel Angular Pressing (ECAP) [10] and High-Pressure Torsion (HPT) [11]. Although, perhaps the most widely used techniques for obtaining heterogeneous structures has been those that only affect the material's surface [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Back stress and strength contributions evolution of a heterogeneous austenitic stainless steel obtained after one pass by equal channel angular sheet extrusion (ECASE)

Serrano-Muñoz

Комиссаров

2020

Int J Adv Manuf Technol

View full text Add to dashboard Cite

This research work studies the different strength contributions of a sheet-shaped heterogeneous austenitic stainless steel, after having been processed at room temperature by one ECASE pass.A significant hardness increase was found throughout its thickness, showing higher values near the edges while the middle area presents the smallest gains. The material heterogeneity gives rise to a plastic gradient deformation between the soft and hard areas of the microstructure. As a consequence, a more significant amount of geometrically necessary dislocations concentrates on the interfaces of these areas, which helps the material to maintain a reliable strength-ductility ratio. After the dislocations contribution to the material strength, the second contribution comes from the back stress mechanism, followed by grain size contributions. All types of contributions were higher in the edge neighborhoods than in the middle zone. Unlike the contributions from dislocations and grain size that decrease as they approach the interfaces between the hard and soft areas, the back-stress contribution does the opposite, showing high increments in these zones.

show abstract

Section: Introductionmentioning

confidence: 99%

Back stress and strength contributions evolution of a heterogeneous austenitic stainless steel obtained after one pass by equal channel angular sheet extrusion (ECASE)

Serrano-Muñoz

Комиссаров

2020

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Figure 5 showed that there was no significant difference between conventional shot peening and double shot peening when using second shot media with low Almen intensity. It could be explained that after the first shot, the grain of the substrate material was broken and changed to a very small grain [ 32 , 33 , 34 ] and a huge amount of energy was required to break the grain into a much smaller size. Thus, when the energy of second shot media was low due to its low Almen intensity, the grain could not be deformed through this low energy.…”

Section: Resultsmentioning

confidence: 99%

“…The hardness of the media was determined as a cause for the changing of the residual compressive stress on the surface. Since silica media has higher hardness than SUS304 media, the impact energy transfer should be greater, resulting in higher plastic deformation on the surface, which affects residual compressive stress [ 32 , 33 , 34 ]. However, the maximum residual compressive stress value of double shot peening with SUS304 media as a second shot was higher than for silica media.…”

Section: Resultsmentioning

confidence: 99%

Effects of the secondary shot in the double shot peening process on the residual compressive stress distribution of Ti–6Al–4V

Ongtrakulkij

Khantachawana

Kajornchaiyakul

et al. 2022

Heliyon

View full text Add to dashboard Cite

Double shot peening is the development of shot peening by shooting large media as a first shot and re-shooting again with smaller media as a second shot in order to achieve high residual compressive stress and hardness at the surface, while the in-depth effect can still be maintained. This research aims to examine the effect of media type and media size when used in the second shot of double shot peening on hardness, roughness, and residual stress to identify the suitable conditions and compare them with single shot peening, such as conventional shot peening and fine shot peening, which was used as the first shot and second shot. Ti–6Al–4V was used as the substrate material, while various diameter sizes of silica and SUS304 media were selected as the media for the second shot in the process. The results showed that in the case of the larger size of silica media in the second shot of double shot peening, the hardness and residual compressive stress on the surface clearly increased more than with the smaller media due to the higher Almen intensity, which affected impact energy. On the other hand, when shooting with SUS304 media as a second shot, the increment of residual compressive stress and hardness, including roughness reduction on the surface, showed less effect than was the case for silica media, due to the lower Almen intensity, which affected the impact energy transfer. This research found that the condition of shooting with 80 μm of silica media as the second shot could generate the highest hardness and residual compressive stress on the surface, which increased by 14% and 53%, respectively, while roughness was decreased by 20% when compared with single shot peening.

show abstract

“…SP by optimized parameters increased yield and ultimate strength but results in a loss of ductility. [ 16 ] However, the recent studies about SP are mainly focused on the traditional materials synthesis and fabrication processes, and the study about 3D printed 316L stainless steel is rather limited.…”

Section: Introductionmentioning

confidence: 99%

Effect of Shot Peening Strengths on Microstructure and Mechanical Properties of 316L Stainless Steel Prepared by 3D Printing

et al. 2023

View full text Add to dashboard Cite

Herein, the influence of shot peening (SP) on the microstructure and mechanical properties of 3D printed 316L stainless steel is studied by optical microscopy (OM), electron backscattered diffraction (EBSD), and mechanical properties testing. The changes in microstructure and mechanical properties of 316L stainless steel by 3D printing under different SP strengths are explored, which are drawn as follows: 1) the microstructure of 3D‐printed 316L stainless steel is greatly refined, and the thickness of ultrafine microstructure in the surface layer increases from 0 to 112.5 μm with the increase in peening strengths from 0 to 0.4 MPa; 2) with the increase of peening strengths from 0 to 0.4 MPa, the hardness increases from 236 to 518 HV, and yield strength increases from 547.3 to 740.7 MPa; and 3) based on the EBSD results, the enhanced hardness and yield strength are caused by refinement hardening and dislocation hardening for the SP samples. In addition, it should be noted that the SP decreases the elongation of 3D‐printed 316L stainless steel up to 9%, and makes the ultimate tensile strength reach the maximum value of 871.2 MPa at 0.2 MPa SP strength.

show abstract

Effects of shot peening parameters on gradient microstructure and mechanical properties of TRC AZ31

Cited by 51 publications

References 32 publications

Back stress and strength contributions evolution of a heterogeneous austenitic stainless steel obtained after one pass by equal channel angular sheet extrusion (ECASE)

Back stress and strength contributions evolution of a heterogeneous austenitic stainless steel obtained after one pass by equal channel angular sheet extrusion (ECASE)

Effects of the secondary shot in the double shot peening process on the residual compressive stress distribution of Ti–6Al–4V

Effect of Shot Peening Strengths on Microstructure and Mechanical Properties of 316L Stainless Steel Prepared by 3D Printing

Contact Info

Product

Resources

About