Paper Title:
Investigation of Dynamic Strain Ageing Effects of Low Alloy Steels 15Kh2MFA and 15Kh2NMFA
  Abstract

The paper summarizes results of tensile tests in low alloy steel (LAS) specimens (steels 15Kh2MFA and 15Kh2NMFA). Slow Strain Rate Tensile tests (SSRT) were performed in air at temperatures from 22 to 325°C over a wide range of strain rates from 2.5×10-6 to 1.67×10-3 s-1. The possible effect of strain rate and temperature to mechanical properties of tested LAS is searched for. The dynamic strain ageing (DSA) was observed within certain temperature ranges at lower strain rates tested and its hardening effect in terms of the maximum strengthening stress decreased linearly with the increase of log strain rate. It has been found that the occurrence of susceptibility to environmentally assisted cracking (EAC) of tested steels in high temperature water (HTW) is corelated to the DSA behavior. The result suggest that DSA reduces ductility of reactor pressure vessel (RPV) steel and its role in enhancing the EAC of RPV steels should not be neglected, in view of the coincidence with susceptibility zones for DSA and EAC in terms of strain rate and temperature. A reasonable coincidence was observed between the susceptibility to DSA exhibited by SSRT in air and with the EAC behavior observed in laboratory experiments.

  Info
Periodical
Edited by
Jaroslav Pokluda
Pages
367-370
DOI
10.4028/www.scientific.net/MSF.482.367
Citation
M. Ernestová, "Investigation of Dynamic Strain Ageing Effects of Low Alloy Steels 15Kh2MFA and 15Kh2NMFA", Materials Science Forum, Vol. 482, pp. 367-370, 2005
Online since
April 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Keum Oh Lee, Sam Son Yoon, Soon Bok Lee, Bum Shin Kim
Abstract: In recent, ferritic stainless steels are widely used in high temperature structure because of their high resistance in thermal fatigue and...
1135
Authors: B.M. Gonzalez, O.J. Santos, C.S.B. Castro, Dagoberto Brandão Santos, Ronaldo Barbosa
Abstract:The mechanical behavior of a fire resistant steel was studied by means of tensile tests performed in the temperature interval from 25 to...
1383
Authors: Sang Won Lee, Jin Kyung Kim, Sung Kyu Kim, Kwang Geun Chin, Bruno C. De Cooman
Abstract:The present study focused on the design and testing of new 3rd generation TWIP steels to find reduced Mn content alternatives to the existing...
262
Authors: Si Qian Zhang, Liang Mao, Li Jia Chen
Chapter 13: Materials Forming
Abstract:Serrated flow has been observed in AZ81 alloy during tensile deformation. The observed static strain ageing effect and negative strain rate...
1937
Authors: Hai Jun Liu, Ding Yi Zhu, Xian Peng, Zhen Ming Hu, Ming Jie Wang
Chapter 10: Alloys, Steel Materials and Technologies
Abstract:Strain rate jump tests were performed on the Fe-Mn-Cu-C TWIP Steels to determine the strain rate sensitivity, and serrated plastic flow was...
861