Slip and fracture behavior of δ-Ni3Nb plates in a polycrystalline nickel-based superalloy during fatigue

被引：13
|
作者：
Wu, Yun [1 ]
Li, Shuangming [2 ]
Kang, Maodong [1 ]
Li, Yunting [3 ]
Liu, Yahui [1 ]
Gao, Haiyan [1 ]
Sun, Baode [1 ,4 ]
Wang, Jun [1 ,4 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[3] Shanghai Jiao Tong Univ, Instrumental Anal Ctr, Shanghai 200240, Peoples R China
[4] Shanghai Jiao Tong Univ, Shanghai Key Lab Adv High Temp Mat & Prec Forming, Shanghai 200240, Peoples R China
来源：
SCRIPTA MATERIALIA | 2019年 / 171卷
基金：
国家重点研发计划;
关键词：
delta-Ni3Nb; Fatigue; Slip; Fracture; Crystal structure; LOW-CYCLE FATIGUE; INCONEL; 718; HEAT-TREATMENT; LAVES PHASES; DEFORMATION; SYSTEMS;
D O I：
10.1016/j.scriptamat.2019.06.013
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The fatigue deformation behavior of delta-Ni3Nb (D0(a) intermetallic phase in nickel-based superalloy) was analyzed in detail to determine its fracture characteristics and possible slip systems. Strong arrangement-dependence (i.e. arrangement direction of plate length relative to loading direction) deformation characteristics were observed. When delta plates were arranged not paralleling to the loading direction, they exhibited certain degree of fatigue resistance. Slip traces were found in the non-parallel delta plates after some fatigue cycles. By analyzing the traces and habit plane of delta, the possible operative slip systems were confirmed to be (010)(delta)[100](delta) and (010)(delta)[102](delta). (C) 2019 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：36 / 41
页数：6
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