On the Creep Strength-Rupture Ductility Behaviour of 1.25Cr-0.5Mo Low Alloy Steel

Mehmet DEMİRKOL

Makale detayları

On the Creep Strength-Rupture Ductility Behaviour of 1.25Cr-0.5Mo Low Alloy Steel

Yazarlar:

Mehmet DEMİRKOL

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 1999 Vol.23 Issue 5, pp.389-402

Belge Tipi:

Makale

Yayın Tarihi:

4/1999

Belge Dili:

Türkçe

Document ID (Org No.):

2000745335

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160

Özet:

 

It is important to select materials having both high  strength and good ductility in most engineering applications.  This is  also true for high temperature problems and the requirement of high  creep strength as well as high rupture ductility is of prime concern.   The creep data of ferritic low alloy 1.25Cr-0.5Mo steel, which is  extensively used in piping systems of fossil power plants, has shown  loss of rupture ductility after certain exposure time depending on its  initial microstructure and applied stress.  This unexpected loss of  ductility is called as rupture ductility trough, and this study covers  the attempts to investigate the dependency of creep rupture ductility  of 1.25Cr-0.5Mo steel on microstructure and stress, in the temperature  range of 773-923 K. An empirical relationship in exponential character  was developed to predict the rupture time leading to rupture ductility  trough, depending on temperature and the initial structure of steel.   Finally, a rupture ductility map was constructed for each steel  investigated in this study, in order to present rupture  strength-rupture ductility data in a more appropriate way.

 

It is important to select materials having both high  strength and good ductility in most engineering applications.  This is  also true for high temperature problems and the requirement of high  creep strength as well as high rupture ductility is of prime concern.   The creep data of ferritic low alloy 1.25Cr-0.5Mo steel, which is  extensively used in piping systems of fossil power plants, has shown  loss of rupture ductility after certain exposure time depending on its  initial microstructure and applied stress.  This unexpected loss of  ductility is called as rupture ductility trough, and this study covers  the attempts to investigate the dependency of creep rupture ductility  of 1.25Cr-0.5Mo steel on microstructure and stress, in the temperature  range of 773-923 K. An empirical relationship in exponential character  was developed to predict the rupture time leading to rupture ductility  trough, depending on temperature and the initial structure of steel.   Finally, a rupture ductility map was constructed for each steel  investigated in this study, in order to present rupture  strength-rupture ductility data in a more appropriate way.

Makale detayları

On the Creep Strength-Rupture Ductility Behaviour of 1.25Cr-0.5Mo Low Alloy Steel

Yazarlar: Mehmet DEMİRKOL

Yayıncı: TUBITAK

Dergi: Turkish Journal of Engineering and Environmental Sciences 1999 Vol.23 Issue 5, pp.389-402

Belge Tipi: Makale

Yayın Tarihi: 4/1999

Belge Dili: Türkçe

Document ID (Org No.): 2000745335

Sıklık: Üç Yıllık

eISSN: 1303-6157

pISSN: 1300-0160

Sayı

Yazarlar:

Mehmet DEMİRKOL

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 1999 Vol.23 Issue 5, pp.389-402

Belge Tipi:

Makale

Yayın Tarihi:

4/1999

Belge Dili:

Türkçe

Document ID (Org No.):

2000745335

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160