Tensile behavior of nickel-base single-crystal superalloy DD6

被引：59
|
作者：
Xiong, Xinhong [1 ]
Quan, Dunmiao [1 ]
Dai, Pengdan [1 ]
Wang, Zhiping [1 ]
Zhang, Qiaoxin [2 ]
Yue, Zhufeng [3 ]
机构：
[1] Wuhan Univ Technol, Sch Logist Engn, Wuhan 430063, Peoples R China
[2] Wuhan Univ Technol, Sch Mech & Elect Engn, Wuhan 430070, Peoples R China
[3] Northwestern Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 636卷
基金：
中国国家自然科学基金;
关键词：
Nickel-base single-crystal superalloy; Tensile behavior; Ductility; STRAIN-RATE; TEMPERATURE-DEPENDENCE; STRESS; SEGREGATION; FRACTURE;
D O I：
10.1016/j.msea.2015.03.125
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Tensile behavior of the nickel-base single-crystal superalloy DD6 was studied from room temperature to 1020 degrees C. The plate specimens were along [001] orientation parallel to the loading axis in tension. The microstructures on the surface and fracture morphology were investigated after tensile test to rupture by scanning electron microscopy (SEM). The results of the present investigation indicate that the yield strength at 650 degrees C is superior to that at room temperature, 850 degrees C and 1020 degrees C. Low ductility and serrated flow in stress-strain curves were also observed at 650 degrees C. The microstructures on the surface of the plate specimens and fracture morphology observation indicated that localized slip which resulted in glide plane decohesion caused the low ductility of DD6 alloy. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：608 / 612
页数：5
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