On the development of instability criteria during hotworking with reference to IN 718

被引：244

作者：

Murty, SVSN

Rao, BN ^{[1
]}

机构：

[1] Vikram Sarabhai Space Ctr, Mat & Met Grp, Trivandrum 695022, Kerala, India

[2] Vikram Sarabhai Space Ctr, Struct Engn Grp, Trivandrum 695022, Kerala, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 254卷 / 1-2期

关键词：

efficiency parameter; strain rate sensitivity parameter; instability condition; processing map; IN; 718;

D O I：

10.1016/S0921-5093(98)00764-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A simple instability condition based on the Ziegler's continuum principles as applied to large plastic Bow, is developed for delineating the regions of unstable metal flow during hot deformation. It can be used for any type of the Bow stress versus strain rate curve. This criterion has been validated using the flow stress data of IN 718 with microstructural observations. The optimum hat working conditions for the superalloy IT 718 are suggested based on the instability map. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：76 / 82

页数：7

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