AGING EFFECTS ON THE HIGH TEMPERATURE TENSILE BEHAVIOR OF INCONEL 718 SUPERALLOY

被引：0
作者：
Bor, H. -Y. [1 ]
Wei, C. -N. [1 ]
Kuo, C. -M. [2 ]
Yang, Y. -T. [2 ]
Tai, C. -C. [2 ]
机构：
[1] Chung Shan Inst Sci & Technol, Mat & Electroopt Res Div, POB 90008-8-4, Tao Yuan 32599, Taiwan
[2] I Shou Univ, Dept Mech & Automat Engn, Saga 84001, Japan
来源：
TMS 2009 138TH ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 1: MATERIALS PROCESSING AND PROPERTIES | 2009年
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Standard heat treatment (HT1) for Inconel 718 superalloy is solid solution at 1095 degrees C, 1h/AC, then aging at 955 degrees C, 1h/AC + 720 degrees C, 8h/FC 48 degrees C/h to 620 degrees C, 8h/AC. In order to study the aging effects of delta phase, two more conditions were studied in this research, namely, HT2 (no aging condition 955 degrees C, 1h/AC) and HT3 (955 degrees C, 3.5h/AC). Tensile tests using servohydraulic MTS system were performed at room temperature, 350 degrees C, 450 degrees C, 550 degrees C, and 650 degrees C. Since HT2 produces no delta phase, elongation to failure are the largest among these three aging conditions. Increasing the 955 degrees C aging time, the UTS and yield stress raise, because platelet delta phase is more uniformly nucleated and more direction oriented at grain boundaries. The fractographics of tensile specimens show that trans-granular fractures are observed in HT2 specimens, nevertheless, only inter-granular fracture is observed in the other two cases.
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页码：297 / +
页数：3
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