The effects of microstructural and chemical surface gradients on fatigue performance of laser powder bed fusion AlSi10Mg
Küçük Resim Yok
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Sa
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Internal and surface imperfections are known to reduce the fatigue strength of parts fabricated by laser powder bed fusion (LPBF). Post-treatment can play a key role to ameliorate the adverse effects of these defects. In this study, severe vibratory peening, as a novel surface treatment based on severe plastic deformation, was applied for the first time on LPBF material. The effects of this mechanical surface treatment were investigated individ-ually and in combination with heat treatment on microstructural and mechanical properties of V-notched LPBF AlSi10Mg samples. The results revealed the simultaneous formation of microstructural and chemical gradients on the surface layer of the mechanically treated samples, resulting in remarkable mechanical properties' improvement. In addition, the hybrid thermal and mechanical post-treatment significantly improved the fatigue life compared to the as-built condition, through affecting multiple physical phenomena regarding surface and subsurface characteristics.
Açıklama
Anahtar Kelimeler
Laser powder bed fusion (LPBF), Severe vibratory peening, Heat treatment, Fatigue, Notch, AliSi10Mg
Kaynak
Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
840
