Long fatigue crack growth in Inconel 718 produced by selective laser melting

被引：103
作者：
Konecna, R. [1 ]
Kunz, L. [2 ]
Nicoletto, G. [3 ]
Baca, A. [1 ]
机构：
[1] Univ Zilina, Dept Mat Engn, Univ 1, Zilina 01026, Slovakia
[2] Acad Sci Czech Republic, Inst Phys Mat, Zizkova 22, Brno 61662, Czech Republic
[3] Univ Parma, Dept Ind Engn, Parco Area Sci,181-A, I-43100 Parma, Italy
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2016年 / 92卷
关键词：
Inconel; 718; Selective laser melting; Microstructure; Fatigue crack growth; Fractography; BEHAVIOR; SUPERALLOY; ALLOYS; MICROSTRUCTURE; PRECIPITATION; POWDER;
D O I：
10.1016/j.ijfatigue.2016.03.012
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Growth of long fatigue cracks is investigated in Inconel 718 superalloy produced by selective laser melting (SLM). The fatigue crack growth curve and the threshold value of the stress intensity factor are experimentally determined on compact-tension specimens fabricated using a RENISHAW A250 system and the recommended processing parameters. The crack propagation curve and the crack propagation threshold of this SLM material are compared with literature data describing the behavior of conventionally manufactured Inconel 718. The fatigue crack growth is discussed in terms of the specific microstructure and residual stresses produced by selective laser melting. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：499 / 506
页数：8
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