Study on Shot Peening Effect of Nitrocarburized Material

Autor:	Kotoji Ando, Katsuyuki Matsui, Hirohito Eto
Rok vydání:	2003
Předmět:	Diffusion layer Stress (mechanics) Compressive load Yield (engineering) Materials science Residual stress Mechanics of Materials Mechanical Engineering Metallurgy General Materials Science Residual Shot peening Fatigue limit
Zdroj:	TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A. 69:1746-1752
ISSN:	1884-8338 0387-5008
DOI:	10.1299/kikaia.69.1746
Popis:	The authors investigated the refined surface characteristics and fatigue strength of Nitrocarburized (N) materials treated by Electro-polishing (EP), Double Shot Peening (DSP) and Stress Double Shot Peening (SDSP). The results obtained are summarized as follows: (1) Increased hardness with the diffusion layer between the surface and depth of 400 μm by DSP. (2) Remarkably high compressive residual stresses by DSP: Surface residual stres =-701 MPa, Maximum compressive residual stress=-733 MPa. (3) On the loading condition of stress ratio (R)=0, the fatigure limits of DSP and SDSP materials were 33% and 58% higher than that of N material, respectively. However, on the condition of R=-1, these were 28% and 39% higher than that of N material, respectively. (4) Same fatigue limit of both DSP and EP+DSP materials. (5) On the condition of R=0, the fatigue limit becomes high according to the lager compressive residual stress. However, on the condition of R=-1, the above relation is not necessarily valid to yield of the material by the compressive loading stress.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2c8053755149596d2b6893187508b6d https://doi.org/10.1299/kikaia.69.1746 Zobrazit plný text záznamu