Comparative Thermal Aging Effects on PM-HIP and Forged Inconel 690

被引：6

作者：

Bullens, Alexander L. ^{[1
]}

Bautista, Esteban ^{[2
]}

Jaye, Elizabeth H. ^{[1
]}

Vas, Nathaniel L. ^{[1
]}

Cain, Nathan B. ^{[3
]}

Mao, Keyou ^{[3
]}

Gandy, David W. ^{[4
]}

Wharry, Janelle P. ^{[1
]}

机构：

[1] Purdue Univ, Sch Nucl Engn, 400 Cent Dr, W Lafayette, IN 47907 USA

[2] Calif State Univ Northridge, Dept Chem & Biochem, 18111 Nordhoff St, Northridge, CA 91330 USA

[3] Purdue Univ, Sch Mat Engn, 701 West Stadium Ave, W Lafayette, IN 47907 USA

[4] Elect Power Res Inst, 1300 West WT Harris Blvd, Charlotte, NC 28262 USA

来源：

JOM | 2018年 / 70卷 / 10期

关键词：

PRECIPITATION BEHAVIOR; MECHANICAL-PROPERTIES; BOUNDARY; NANOINDENTATION; INDENTATION; SIZE;

D O I：

10.1007/s11837-018-2818-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study compares thermal aging effects in Inconel 690 (IN690) produced by forging and powder metallurgy with hot isostatic pressing (PM-HIP). Isothermal aging is carried out over 400-800A degrees C for up to 1000 h and then metallography and nanoindentation are utilized to relate grain microstructure with hardness and yield strength. The PM-HIP IN690 maintains a constant grain size through all aging conditions, while the forged IN690 exhibits limited grain growth at the highest aging temperature and longest aging time. The PM-HIP IN690 exhibits comparable mechanical integrity as the forged material throughout aging: hardness and yield strength are unchanged with 100 h aging, but increase after 1000 h aging at all temperatures. In both the PM-HIP and forged IN690, the Hall-Petch relationship for Ni-based superalloys predicts yield strength for 0-100 h aged specimens, but underestimates yield strength in the 1000 h aged specimens because of thermally induced precipitation.

引用

页码：2218 / 2223

页数：6

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