Dynamic strain ageing of an austenitic superalloy-Temperature and strain rate effects

Ajit K. Roy; Joydeep Pal; Chandan Mukhopadhyay

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Dynamic strain ageing of an austenitic superalloy-Temperature and strain rate effects

机译：奥氏体高温合金的动态应变时效-温度和应变率效应

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摘要

The tensile data involving austenitic Alloy C-276 suggest that this alloy is capable of maintaining appreciable structural strength at temperatures relevant to the sulfuric acid decomposition process related to the nuclear hydrogen initiative. Reduced failure strain and formation of serrations, characteristics of dynamic strain ageing (DS A), were noted within susceptible temperature regimes. An average activation energy of 55 kJ/mol, and work hardening index ranging from 0.68 to 0.75 were determined as functions of different testing temperature and strain rates. The occurrence of DSA was also associated with enhanced dislocation density. Depending on the testing temperature, a combination of ductile and intergranular brittle failures was observed with the tested specimens.

机译：涉及奥氏体合金C-276的拉伸数据表明，该合金能够在与核氢原子能相关的硫酸分解过程相关的温度下保持明显的结构强度。在易受温度影响的范围内，降低了失效应变并减少了锯齿的形成，具有动态应变老化（DS A）的特性。根据不同的测试温度和应变速率，确定平均活化能为55 kJ / mol，加工硬化指数为0.68至0.75。 DSA的发生还与位错密度增加有关。根据测试温度，对被测样品观察到延性和晶间脆性破坏的组合。

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《Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing》 |2008年第2期|p.363-370|共8页
作者
Ajit K. Roy; Joydeep Pal; Chandan Mukhopadhyay;
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作者单位

Department of Mechanical Engineering, University of Nevada, Las Vegas (UNLV), 4505 Maryland Parkway,Box 454027, Las Vegas, NV 89154-4027, United States;

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原文格式 PDF
正文语种 eng
中图分类工程材料学;
关键词
alloy C-276; dynamic strain ageing; activation energy; work hardening index; dislocation density;

机译：合金C-276;动态应变时效;活化能;加工硬化指数;位错密度;

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1. Corrigendum to 'Dynamic strain ageing of an austenitic superalloy—Temperature and strain rate effects' [Mater. Sci. Eng. A 474 (2008) 363-370] [J] . Ajit K. Roy, Joydeep Pal, Chandan Mukhopadhyay Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing . 2008,第1a2期

机译：“奥氏体高温合金的动态应变时效—温度和应变率效应”更正。科学。 A 474（2008）363-370]
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机译：应用应变对老化率的影响：项目概况

Dynamic strain ageing of an austenitic superalloy-Temperature and strain rate effects

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