Effect of coating microstructure on the fatigue properties of steel thermally sprayed with Ni-based self-fluxing alloy

被引：18

作者：

Akebono, Hiroyuki ^{[1
]}

Komotori, Jun ^{[2
]}

Shimizu, Masao ^{[2
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Dept Mech Syst Engn, Higashihiroshima, Hiroshima 7398527, Japan

[2] Keio Univ, Dept Engn Mech, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2008年 / 30卷 / 05期

关键词：

fatigue; porosity size; microstructure; Ni-based self-fluxing alloy;

D O I：

10.1016/j.ijfatigue.2007.07.003

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In order to investigate the factors that most strongly influence fatigue properties of steel thermally sprayed with Ni-based self-fluxing alloy, we prepared three types of thermally sprayed specimens which differed in heating time in the fusing process. Rotational bending fatigue tests were carried out, and coating microstructures were observed. The results show that fatigue properties of steel thermally sprayed with Ni-based self-fluxing alloy were affected by two factors. The first factor is the size and population of porosities in the coating. This factor was changed by fusing time with longer fusing times producing larger and more porosities. Because the fatigue crack initiates at the porosities, specimens fused for longer time exhibit lower fatigue strength. The second factor is lowered hardness of Ni matrix accompanying chromium segregation. The sprayed specimens fused for longer time exhibit lower fatigue strength, because the longer fusing process induces segregation of the chromium compound in the coated micro structures. Therefore, performing the fusion for a shorter time is effective for producing sprayed materials of enhanced fatigue properties. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：814 / 821

页数：8

共 23 条

[1]

AKEBONO H, 2004, P INT C EXP MECH

[2] The effect of coating thickness on fatigue properties of steel thermally sprayed with Ni-based self-fluxing alloy [J].

Akebono, Hiroyuki ;

Komotori, Jun ;

Suzuki, Hideto .

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2006, 20 (25-27) :3599-3604

[3] Wear behaviour of thermally sprayed ceramic oxide coatings [J].

Bolelli, Giovanni ;

Cannillo, Valeria ;

Lusvarghi, Luca ;

Manfredini, Tiziano .

WEAR, 2006, 261 (11-12) :1298-1315

[4] Corrosion and erosion damage mechanisms during erosion-corrosion of WC-Co-Cr cermet coatings [J].

de Souza, VA ;

Neville, A .

WEAR, 2003, 255 :146-156

[5] Investigation of scuffing damage in aluminum engines with thermal spray coatings [J].

Edrisy, A ;

Perry, T ;

Alpas, AT .

WEAR, 2005, 259 :1056-1062

[6]

EDRISY A, 2004, ELECTROCHIM ACTA, V49, P2803

[7] Corrosion and wear behaviour of HVOF cermet coatings used to replace hard chromium [J].

Fedrizzi, L ;

Rossi, S ;

Cristel, R ;

Bonora, PL .

ELECTROCHIMICA ACTA, 2004, 49 (17-18) :2803-2814

[8] Mechanical and thermal properties of HVOF sprayed Ni based alloys with carbide [J].

Hamatani, H. ;

Ichiyama, Y. ;

Kobayashi, J. .

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2002, 3 (04) :319-326

[9] Influence of the thermal-spray procedure on the properties of a CoNiCrAlY coating [J].

Higuera, V ;

Belzunce, FJ ;

Riba, J .

SURFACE & COATINGS TECHNOLOGY, 2006, 200 (18-19) :5550-5556

[10]

Hoffman ME, 2001, INT J FATIGUE, V23, pS1

← 1 2 3 →