Influence of build orientation on static and axial fatigue properties of maraging steel specimens produced by additive manufacturing

被引：62

作者：

Meneghetti, G. ^{[1
]}

Rigon, D. ^{[1
]}

Cozzi, D. ^{[2
]}

Waldhauser, W. ^{[2
]}

Dabala, M. ^{[1
]}

机构：

[1] Univ Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy

[2] Joanneum Res Forsch Gesell mbH, Inst Surface Technol & Photon, Niklasdorf Leobner Str 94, A-8712 Niklasdorf, Austria

来源：

3RD INTERNATIONAL SYMPOSIUM ON FATIGUE DESIGN AND MATERIAL DEFECTS (FDMD 2017) | 2017年 / 7卷

关键词：

Additive manufacturing; Maraging steel; Axial fatigue; LASER; PERFORMANCE; TI-6AL-4V; BEHAVIOR; MICROSTRUCTURE; EVOLUTION;

D O I：

10.1016/j.prostr.2017.11.072

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Additive manufacturing involves a layer-by-layer build-up of mechanical parts and it is a manufacturing technology that can be adopted with different engineering metal materials like steels, aluminium and titanium alloys. Aim of the present investigation is to analyse the influence of the build orientation on static and axial fatigue properties of maraging steel specimens manufactured by Direct Metal Laser Sintering (DMLS) of EOS metal powders. After manufacturing, some of the specimens were subjected to age hardening heat treatment (490 C for 6 hours, followed by air cooling). Both heat treated and as-manufactured specimens have been built at 0 as well as at 90 orientation with respect to the specimen's axis. Analyses of the crack initiation point are performed in order to investigate the fatigue failure mechanisms. Finally, the fatigue strength of the additively manufactured specimens was compared with that exhibited by vacuum melted specimens of the same steel reported in literature. Copyright (C) 2017 The Authors. Published by Elsevier B.V.

引用

页码：149 / 157

页数：9

共 33 条

[1]

[Anonymous], 2010, 1706 DIN EN

[2]

[Anonymous], A276 ASTM

[3] A unified treatment of the mode I fatigue limit of components containing notches or defects [J].