Microscale Mechanical Behavior of The Subsurface by Finishing Processes  

Oleh:

Warren, A.W. ; Guo, Y. B.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Journal of Manufacturing Science and Engineering vol. 127 no. 2 (May 2005), page 333-338.
Topik: BEHAVIOUR; microscale; mechanical behaviour; subsurface; finishing

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ93.7 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Hard turning, grinding, and honing are common finishing processes in today's production. The machined subsurface undergoes severe deformation and possible microstructure changes in a small scale subsurface layer (< 20 µm). Mechanical behavior of this shallow layer is critical for component performance such as fatigue and wear. Due to the small size of this region, mechanical behavior of this shallow layer is hard to measure using traditional material testing. With the nanoindentation method, mechanical behaviour (nanohardness and modulus) at the microscale in subsurface was measured for AISI 52100 and AISI 1070 steel components machined by hard turning, grinding, and honing. The test results show that white layer increases nanohardness but decreases modulus of a turned surface. Nanohardness and modulus of the ground surface are slightly smaller than the honed one in the subsurface. However, grinding produces higher nanohardness and modulus in near - surface (< 10 µm) than honing, while honing produces more uniform hardness and modulus in the near - surface and subsurface, and would improve component performance. Nanohardness and modulus of the machined near - surface are strongly influenced by strain hardening, residual stress, size - effect, and microstructure changes.

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