Characterization of the Microstructure and Surface Roughness Effects on Fatigue Life Using the Tanaka-Mura-Wu Model

被引：6
|
作者：
Wu, Xijia [1 ]
Kanz, Philippe [2 ]
Mahmoud, Hassan [3 ]
Millar, Jason [3 ]
Shabani, Peyman [3 ]
Torres, Jose Martinez [3 ]
机构：
[1] CNR, Aerosp Res Ctr, Struct & Mat Performance Lab, Ottawa, ON K1A 0R6, Canada
[2] Univ Ottawa, Dept Mech Engn, Ottawa, ON K1N 6N5, Canada
[3] Carleton Univ, Dept Mech & Aerosp Engn, Ottawa, ON K1S 5B6, Canada
来源：
APPLIED SCIENCES-BASEL | 2021年 / 11卷 / 21期
基金：
加拿大自然科学与工程研究理事会;
关键词：
fatigue; life prediction; AM materials; TMW model; ADDITIVE MANUFACTURED TI-6A1-4V; MULTIAXIAL FATIGUE; FAILURE MECHANISMS; BEHAVIOR; WROUGHT; DEFORMATION; TI-6AL-4V; INCLUSION; HIP;
D O I：
10.3390/app11219955
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Additive manufacturing (AM) has drawn tremendous interest in engineering applications because it offers almost unlimited possibilities of innovative structural design to save weight and optimize performance. However, fatigue properties are one of the limiting factors for structural applications of AM materials. The recently developed Tanaka-Mura-Wu (TMW) model is modified to include the microstructure and surface roughness factors, in addition to the material's elastic modulus, surface energy and Burgers vector, to predict the fatigue curves as functions of stress or plastic strain for several typical AM materials as well as their conventional (wrought) counterpart. Furthermore, with statistical characterization of the microstructural effect, the model can be established to evaluate fatigue design allowables.
引用
收藏
页数：13
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