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Surface integrity after mechanical hardening of various aluminium alloys
Žagar, Sebastjan (Author), Grum, Janez (Author)

URLURL - Presentation file, Visit http://www.dlib.si/details/URN:NBN:SI:doc-O25DY8VD This link opens in a new window

Abstract
Namen prispevka je predstaviti dve vrsti aluminijevih zlitin AlCu4PbMgMn (2007-T351) in AlSi1MgMn (6082-T651), ki sta bili mikro površinsko utrjeni z različnimi pogoji udarnega utrjevanja s kinetično energijo kroglic. Udarno mikroutrjevanje površine je bilo izvedeno s kaljenimi jeklenimi kroglicami premera 0,5 mm, oznake S170 s trdoto 56 HRC, z različnimi tlaki zraka in z masnimi pretoki, ki zagotavljajo različne Almenove intenzitete. Cilj raziskave je, da z eksperimentalnimi metodami raziščemo zvezo med pogoji udarnega utrjevanja aluminijevih zlitin ter hrapavostjo in topografijo površine z mikroskopskimi preiskavami poškodb na površini, podprto z analizo mikrostrukture, trdote in zaostalih napetosti...

Language:English
Keywords:shot peening, surface integrity, aluminium alloys, residual stresses, microhardness
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2011
Publisher:= Association of Mechanical Engineers and Technicians of Slovenia et al.
Number of pages:str. 334-344
Numbering:Vol. 57, no. 4
UDC:620.178.6
ISSN on article:0039-2480
DOI:10.5545/sv-jme.2010.092 Link is opened in a new window
COBISS.SI-ID:11989531 Link is opened in a new window
Views:421
Downloads:162
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Record is a part of a journal

Title:Strojniški vestnik
Shortened title:Stroj. vestn.
Publisher:Zveza strojnih inženirjev in tehnikov Slovenije [et al.], = Association of Mechanical Engineers and Technicians of Slovenia [et al.]
ISSN:0039-2480
COBISS.SI-ID:762116 This link opens in a new window

Secondary language

Language:Slovenian
Abstract:
The paper presents two types of aluminium alloys, EN AW 2007 and EN AW 6082, treated by shot peening in which the surfaces of the metals were subjected to cold deformation under different treatment conditions. For this purpose, S170 steel particles with a diameter of 0.5 mm and a hardness of 56 HRC were used with different air pressures and mass flows, providing Almen intensity levels between 10A and 28A. The treated surfaces were studied in terms of surface integrity at macro- and microscopic levels, and the surface roughness, microhardness profiles, and residual stresses of each treated surface layer were recorded. Research results reveal significant differences between the properties recorded in the surface integrity examination, which are based on the selected shot peening parameters. This means that these parameters substantially impact the surface conditions and the surface layer. The microscopic analysis confirmed that the sharpest treatment conditions result in surface deformations which may cause cracks and subsequently lead to the mechanical part's collapse.

Keywords:aluminijeve zlitine, udarno utrjevanje, hrapavost površine, topografija površine, mikrotrdota, zaostale napetosti, materiali

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