Relationship between Damping Factor and Compressive Residual Stress for Shot-Peened Austenitic Stainless Steel

Abstract

The mechanical properties of austenitic stainless steel are rarely improved by heat treatment. Shot peening is a well-known cold working process that affects thin surface of materials. By controlling the shot peening intensity and shot size, the variable mechanical properties film thickness was obtained from 0.05 mm to 0.5 mm. The damping factor and compressive residual stress are determined experimentally and forming a relation between them. It was found that damping factor in thin film surface increases with depth of deformed layer. An investigation was carried out, and it was found that the increase in damping factor was due to introduction of compressive residual stress and increased hardness due to shot peening. The paper discusses a model of changing damping properties with compressive residual stress and depth of deformed layer of austenitic stainless steel.

Influence of Three-Dimensional Printing Parameters on Compressive Properties and Surface Smoothness of Polylactic Acid Specimens

“…This is mainly due to the higher residual stresses within the prints induced by higher magnitudes of temperature gradients at low printing speeds. It has been shown that the induction of compressive residual stresses can increase the damping capacity of materials [ 69 ].…”

Pengaruh Waktu Post-Treatment Terhadap Sifat Permukaan Lapisan Nitridasi

“…Apabila merujuk pada fenomena shot peening yang bertujuan untuk meningkatkan ketahanan fatik [7]− [10] maka angka kekerasan yang ditunjukkan dalam Gambar 3 seharusnya mendapatkan titik optimasi karena kondisi lapisan telah mencapai titik jenuh [9]. Perlu dilakukan penelitian lanjut yakni penambahan waktu post-treatment sehingga mendapatkan titik optimasi angka kekerasan.…”