The effect of a heat treatment on improving the fatigue properties of aluminium alloy 7075-T6 coated with TiN by PVD

Reza Oskouei; Raafat Ibrahim

doi:10.1016/j.proeng.2011.04.321

The effect of a heat treatment on improving the fatigue properties of aluminium alloy 7075-T6 coated with TiN by PVD

Reza Oskouei, Raafat Ibrahim

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

1 Downloads (Pure)

Abstract

In this paper, fatigue properties of coated aluminium alloy 7075-T6 with a TiN deposit of 3 μm using physical vapour deposition (PVD) have been studied. It was determined that the application of a PVD hot process significantly decreased the tensile and fatigue strength of the substrate-coating system due to the effect of a high operating temperature (450° C). Fatigue life of the coated aluminium showed a considerable reduction of 94% in the fatigue life after experiencing the deposition temperature. Taking into consideration the effect of the high deposition temperature to remove the benefits of T6 from the aluminium alloy, it was therefore believed that re-applying the T6 cycle could recover the lost properties of the aluminium substrate. The tensile and fatigue tests results after applying the post heat treatment revealed large improvements in the yield, ultimate and fatigue strength of the coated material to approach initial properties of the uncoated 7075-T6.

Original language	English
Pages (from-to)	1936-1942
Number of pages	7
Journal	Procedia Engineering
Volume	10
DOIs	https://doi.org/10.1016/j.proeng.2011.04.321
Publication status	Published - 2011
Externally published	Yes

Keywords

7xxx aluminium alloys
Heat treatment
Low and high cycle fatigue
PVD hard coatings

Access to Document

10.1016/j.proeng.2011.04.321Licence: CC BY-NC-ND

Oskouei_Effect_P2011Final published version, 1.22 MBLicence: CC BY-NC-ND

Cite this

@article{3ac5da832b854ab7b7b6211d6188c7b4,

title = "The effect of a heat treatment on improving the fatigue properties of aluminium alloy 7075-T6 coated with TiN by PVD",

abstract = "In this paper, fatigue properties of coated aluminium alloy 7075-T6 with a TiN deposit of 3 μm using physical vapour deposition (PVD) have been studied. It was determined that the application of a PVD hot process significantly decreased the tensile and fatigue strength of the substrate-coating system due to the effect of a high operating temperature (450° C). Fatigue life of the coated aluminium showed a considerable reduction of 94% in the fatigue life after experiencing the deposition temperature. Taking into consideration the effect of the high deposition temperature to remove the benefits of T6 from the aluminium alloy, it was therefore believed that re-applying the T6 cycle could recover the lost properties of the aluminium substrate. The tensile and fatigue tests results after applying the post heat treatment revealed large improvements in the yield, ultimate and fatigue strength of the coated material to approach initial properties of the uncoated 7075-T6.",

keywords = "7xxx aluminium alloys, Heat treatment, Low and high cycle fatigue, PVD hard coatings",

author = "Reza Oskouei and Raafat Ibrahim",

year = "2011",

doi = "10.1016/j.proeng.2011.04.321",

language = "English",

volume = "10",

pages = "1936--1942",

journal = "Procedia Engineering",

issn = "1877-7058",

publisher = "Elsevier",

}

TY - JOUR

T1 - The effect of a heat treatment on improving the fatigue properties of aluminium alloy 7075-T6 coated with TiN by PVD

AU - Oskouei, Reza

AU - Ibrahim, Raafat

PY - 2011

Y1 - 2011

N2 - In this paper, fatigue properties of coated aluminium alloy 7075-T6 with a TiN deposit of 3 μm using physical vapour deposition (PVD) have been studied. It was determined that the application of a PVD hot process significantly decreased the tensile and fatigue strength of the substrate-coating system due to the effect of a high operating temperature (450° C). Fatigue life of the coated aluminium showed a considerable reduction of 94% in the fatigue life after experiencing the deposition temperature. Taking into consideration the effect of the high deposition temperature to remove the benefits of T6 from the aluminium alloy, it was therefore believed that re-applying the T6 cycle could recover the lost properties of the aluminium substrate. The tensile and fatigue tests results after applying the post heat treatment revealed large improvements in the yield, ultimate and fatigue strength of the coated material to approach initial properties of the uncoated 7075-T6.

AB - In this paper, fatigue properties of coated aluminium alloy 7075-T6 with a TiN deposit of 3 μm using physical vapour deposition (PVD) have been studied. It was determined that the application of a PVD hot process significantly decreased the tensile and fatigue strength of the substrate-coating system due to the effect of a high operating temperature (450° C). Fatigue life of the coated aluminium showed a considerable reduction of 94% in the fatigue life after experiencing the deposition temperature. Taking into consideration the effect of the high deposition temperature to remove the benefits of T6 from the aluminium alloy, it was therefore believed that re-applying the T6 cycle could recover the lost properties of the aluminium substrate. The tensile and fatigue tests results after applying the post heat treatment revealed large improvements in the yield, ultimate and fatigue strength of the coated material to approach initial properties of the uncoated 7075-T6.

KW - 7xxx aluminium alloys

KW - Heat treatment

KW - Low and high cycle fatigue

KW - PVD hard coatings

UR - http://www.scopus.com/inward/record.url?scp=80052941467&partnerID=8YFLogxK

U2 - 10.1016/j.proeng.2011.04.321

DO - 10.1016/j.proeng.2011.04.321

M3 - Article

VL - 10

SP - 1936

EP - 1942

JO - Procedia Engineering

JF - Procedia Engineering

SN - 1877-7058

ER -

The effect of a heat treatment on improving the fatigue properties of aluminium alloy 7075-T6 coated with TiN by PVD

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this