Detail Effects of Shot-Peening on Fretting-Fatigue Behavior of Ti-6Al-4V   Oleh:  Namjoshi, S. A. ; Jain, V. K. ; Mall, S. Jenis: Article from Bulletin/Magazine Dalam koleksi: Journal of Engineering Materials and Technology vol. 124 no. 2 (2002), page 222-228. Topik: BEHAVIOUR; shot - peening; fretting - fatigue; behaviour Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ87.3 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel The effects of shot - peening on the fretting fatigue behavior of titanium alloy, Ti - 6Al - 4V were investigated. Specimens were shot - peened as per AMS 2432 standard. X - ray diffraction analysis measured a maximum compressive stress of 800 MPa at the specimen surface, which reduced to zero at a depth of 188 µm. The compensatory residual tensile stress in the specimen was estimated using a curve fitting technique, the maximum value of which was found to be 260 MPa at a depth of 255 µm. Fretting fatigue tests were conducted at room temperature at a cyclic frequency of 200 Hz. Scanning electron microscopy of the shot - peened fretting fatigue specimens showed that the crack initiated at a point below the contact surface, the depth of which was in the range of 200 – 300 µm. Finite element analysis of the fretting fatigue specimens was also conducted. Fatigue life diagrams were established for the fretting fatigue specimens with and without shot - peening, and were compared to those under the plain fatigue condition, i. e. without fretting. Shot-peening improved the fretting fatigue life of Ti - 6Al -4 V ; furthermore, it moved the crack initiation site from the fretting contact region to a region inside the specimen. Moreover, stress analysis showed that the fatigue failure of shot-peened specimens was caused by the compensatory tensile residual stress. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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