Yıl 2011,
Cilt: 26 Sayı: 2, 0 - , 20.02.2013
Öz
Bu çalışmada %0,0981 C, %1,653 Mn, %0,54 Si, %0,69 Ni içeren çift fazlı bir çeliğin çekme özellikleriüzerinde martenzit ve yeni ferrit hacim oranının etkisi araştırılmıştır. 715, 725 and 752oC de uygulanan kritiktavlama sonrasında numuneler suda, yağda ve fırında soğutulmuştur. Optik mikroskop incelemelerinde fırındasoğutma hızında bile karbür oluşumuna rastlanmamıştır. Sonuçlar, aynı kritik sıcaklıkta tavlama sonrasında,kullanılan soğutma şartları içerisinde en fazla martenzit hacim oranının suda soğutma ile elde edildiğinigöstermiştir. Martenzit içeriğinin artması ile homojen uzama azalırken, akma ve çekme mukavemetlerinin herikisi de artmıştır. Sabit martenzit hacim oranında, kritik tavlama sıcaklıklarından kontrollü soğutma sonucuoluşan yeni ferrit hacim oranının değiştiği gözlenmiştir. Yeni ferritin varlığı mukavemeti azaltıp, sünekliğiartırmıştır. Taramalı elektron mikroskobu (SEM) kırık yüzey incelemeleri yeni ferrit içeren numunelerin boyunbölgesinde daha yüksek yoğunlukta mikroboşluk içerdiğini ve tamamen sünek kırılma davranışı sergilediğinigöstermiştir. Bunun aksine yeni ferrit içermeyen numunelerin daha düşük yoğunlukta mikroboşluk içerdiği vehem klivaj hem de sünek kırılma modunu bir arada sergilediği gözlenmiştir.
Anahtar Kelimeler
Epitaksiyal ferrit martenzit çift fazlı mikroyapı çekme özellikleri kırılma davranışı.
Kaynakça
- Rashid, M.S., “Relation between steel
- microstructure and formability”, Formable
- HSLA and dual-phase steels, Chicago, Illinois,
- AIME, 1-24, 26 Ekim 1977.
- Koo, J.Y. ve Thomas, G., “Design of dublex
- carbon steels for improved strength: weight
- applications”, Formable HSLA and dual-phase
- steels, Chicago, Illinois, AIME, 40-55, 26 Ekim
- -
- Rigsbee, J.M. ve VanderArend, P.J., “Laboratory
- studies of microstructures and structure-property
- relationships in dual-phase HSLA steels”,
- Formable HSLA and dual-phase steels,
- Chicago, Illinois, AIME, 56-86, 26 Ekim 1977.
- Morrow, J.W. ve Tither, G., Buck, R.M.,
- “Intercritically annealed dual phase steels for
- automotive applications”, Formable HSLA and
- dual-phase steels, Chicago, Illinois, AIME, 151-
- , 26 Ekim 1977.
- Hayami, S., Furukawa, T., Gondoh, H., Takechi,
- H., “Recent developments in formable hot and
- cold rolled HSLA including dual-phase sheet
- steels”, Formable HSLA and dual-phase steels,
- Chicago, Illinois, AIME, 167-180, 26 Ekim 1977.
- Davies, R.G. ve Magee, C.L., “Physical
- metallurgy of automotive high strength steels”,
- Structure and properties of dual-phase steels,
- New Orleans, AIME, 1-19, 19-21 Şubat 1979.
- Davies, R.G., “On the ductility of dual-phase
- steels”, Formable HSLA and dual-phase steels,
- Chicago, Illinois, AIME, 25-39, 26 Ekim 1977.
- Lawson, R.D., Matlock, D.K., Krauss, G., “The
- effect of microstructure on the deformation
- behaviour and mechanical properties of a dual
- phase steels”, Fundamentals of dual-phase
- steels, Chicago, Illinois, AIME, 347-381, 23-24
- Şubat 1981.
- Davies, R.G., “Influence of martensite
- composition and content on the properties of dual
- phase steels”, Metallurgical Transactions A,
- Cilt 9A, 671-679, 1978.
- Huppi, G.S., Matlock, D.K., “An evalution of the
- importance of epitaxial ferrite in dual phase steel
- microstructures”, Scripta Metallurgica, Cilt 14,
- -1243, 1980.
- Erdoğan, M. ve Priestner, R., “Effect of
- martensite content, its dispersion and epitaxial
- content on Bauschinger behaviour of dual phase
- steel”, Materials Science and Technology, Cilt
- , 1273-1284, 1999.
- Jeong, W.C. ve Kim, C.H., “Deformation
- characteristics of retained ferrite and transformed
- ferrite in a dual phase steel”, Metallurgical
- Transactions A, Cilt 18A, 629-635, 1987.
- Andrews, K.W., “Empirical formulae for the
- calculation of some transformation temperatures”,
- Journal of The Iron and Steel Institute, Cilt
- , 721-727, 1965.
- Lawson, R.D., “Matlock, D.K., Krauss, G., “An
- etching technique for microalloyed dual phase
- steels”, Metallography, Cilt 13, No 1, 71-87,
- -
- TS 138 EN 10002-1 Metalik Malzemeler-Çekme
- Deneyi, TSE, 25-26, 2004.
- Ahmad, E. ve Priestner, R., “Effect of rolling in
- the intercritical region on the tensile properties of
- dual phase steel”, Journal of Materials
- Engineering Performance, Cilt 7, No 6, 772-
- , 1998.
- Sarwar, M. ve Priestner, R., “Influence of ferritemartensite
- microstructural morphology on tensile
- properties of dual phase steel”, Journal of
- Materials Science, Cilt 31, 2091-2095, 1996.
- Erdoğan, M., Tekeli, S., Pamuk, O., Erkan, A.,
- “Surface carburized AISI 8620 steel with dual
- phase core microstructure”, Materials Science
- and Technology, Cilt 18, 840-844, 2002.
- Cjang W.J. ve Kim C.H., “Ferrite Growth on
- Cooling after Intercritical Annealing in a Dual Phase
- Steel”, Scripta Metallurgica, Cilt 118, 37-42,1985.
- Tanaka T., Nishida M., Hashiguchi ve Kato T.L.,
- “Formation and Properties of Ferrite Plus
- Martensite Dual-Phase Steels”, Structure and
- properties of dual phase steels, New Orleans,
- AIME, 221-242, 19-21 Şubat 1979.
- Terao, H., “Structure and Mechanical Properties
- of High-Manganese Dual-Phase Steels”, Journal
- of Materials Science, Cilt 21, 1715-1720, 1986.
- Matlock, D.K., Krauss, G., Ramos, L.F., Huppi,
- G.S., “A correlation of processing variables with
- deformation behavior of dual-phase steels”,
- Structure and properties of dual-phase steels,
- New Orleans, AIME, 62-90, 19-21 Şubat 1979.
- Speich, G.R. ve Miller, R.L., “Mechanical
- Properties of Ferrite-Martensite Steels”,
- Structure and properties of dual-phase steels,
- New Orleans, AIME, 145-182, 19-21 Şubat 1979.
- Sarwar, M., Ahmad, E., Qureshi, K.A., Manzoor,
- T., “Influence of epitaxial ferrite on the tensile
- properties of dual phase steel”, Materials &
- Design, Cilt 28, No 1, 335-340, 2007.
- Erdoğan, M., “The effect of new ferrite content
- on the tensile fracture behaviour of dual phase
- steels”, Journal of Materials Science, Cilt 37,
- -3630, 2002.
- Steinbrunner, D.L., Matlock, D.K., Krauss, G.,
- “Void formation during tensile testing of dual
- phase steels”, Metallurgical Transaction A, Cilt
- A, 579-589, 1988.
Yıl 2011,
Cilt: 26 Sayı: 2, 0 - , 20.02.2013
Öz
Kaynakça
- Rashid, M.S., “Relation between steel
- microstructure and formability”, Formable
- HSLA and dual-phase steels, Chicago, Illinois,
- AIME, 1-24, 26 Ekim 1977.
- Koo, J.Y. ve Thomas, G., “Design of dublex
- carbon steels for improved strength: weight
- applications”, Formable HSLA and dual-phase
- steels, Chicago, Illinois, AIME, 40-55, 26 Ekim
- -
- Rigsbee, J.M. ve VanderArend, P.J., “Laboratory
- studies of microstructures and structure-property
- relationships in dual-phase HSLA steels”,
- Formable HSLA and dual-phase steels,
- Chicago, Illinois, AIME, 56-86, 26 Ekim 1977.
- Morrow, J.W. ve Tither, G., Buck, R.M.,
- “Intercritically annealed dual phase steels for
- automotive applications”, Formable HSLA and
- dual-phase steels, Chicago, Illinois, AIME, 151-
- , 26 Ekim 1977.
- Hayami, S., Furukawa, T., Gondoh, H., Takechi,
- H., “Recent developments in formable hot and
- cold rolled HSLA including dual-phase sheet
- steels”, Formable HSLA and dual-phase steels,
- Chicago, Illinois, AIME, 167-180, 26 Ekim 1977.
- Davies, R.G. ve Magee, C.L., “Physical
- metallurgy of automotive high strength steels”,
- Structure and properties of dual-phase steels,
- New Orleans, AIME, 1-19, 19-21 Şubat 1979.
- Davies, R.G., “On the ductility of dual-phase
- steels”, Formable HSLA and dual-phase steels,
- Chicago, Illinois, AIME, 25-39, 26 Ekim 1977.
- Lawson, R.D., Matlock, D.K., Krauss, G., “The
- effect of microstructure on the deformation
- behaviour and mechanical properties of a dual
- phase steels”, Fundamentals of dual-phase
- steels, Chicago, Illinois, AIME, 347-381, 23-24
- Şubat 1981.
- Davies, R.G., “Influence of martensite
- composition and content on the properties of dual
- phase steels”, Metallurgical Transactions A,
- Cilt 9A, 671-679, 1978.
- Huppi, G.S., Matlock, D.K., “An evalution of the
- importance of epitaxial ferrite in dual phase steel
- microstructures”, Scripta Metallurgica, Cilt 14,
- -1243, 1980.
- Erdoğan, M. ve Priestner, R., “Effect of
- martensite content, its dispersion and epitaxial
- content on Bauschinger behaviour of dual phase
- steel”, Materials Science and Technology, Cilt
- , 1273-1284, 1999.
- Jeong, W.C. ve Kim, C.H., “Deformation
- characteristics of retained ferrite and transformed
- ferrite in a dual phase steel”, Metallurgical
- Transactions A, Cilt 18A, 629-635, 1987.
- Andrews, K.W., “Empirical formulae for the
- calculation of some transformation temperatures”,
- Journal of The Iron and Steel Institute, Cilt
- , 721-727, 1965.
- Lawson, R.D., “Matlock, D.K., Krauss, G., “An
- etching technique for microalloyed dual phase
- steels”, Metallography, Cilt 13, No 1, 71-87,
- -
- TS 138 EN 10002-1 Metalik Malzemeler-Çekme
- Deneyi, TSE, 25-26, 2004.
- Ahmad, E. ve Priestner, R., “Effect of rolling in
- the intercritical region on the tensile properties of
- dual phase steel”, Journal of Materials
- Engineering Performance, Cilt 7, No 6, 772-
- , 1998.
- Sarwar, M. ve Priestner, R., “Influence of ferritemartensite
- microstructural morphology on tensile
- properties of dual phase steel”, Journal of
- Materials Science, Cilt 31, 2091-2095, 1996.
- Erdoğan, M., Tekeli, S., Pamuk, O., Erkan, A.,
- “Surface carburized AISI 8620 steel with dual
- phase core microstructure”, Materials Science
- and Technology, Cilt 18, 840-844, 2002.
- Cjang W.J. ve Kim C.H., “Ferrite Growth on
- Cooling after Intercritical Annealing in a Dual Phase
- Steel”, Scripta Metallurgica, Cilt 118, 37-42,1985.
- Tanaka T., Nishida M., Hashiguchi ve Kato T.L.,
- “Formation and Properties of Ferrite Plus
- Martensite Dual-Phase Steels”, Structure and
- properties of dual phase steels, New Orleans,
- AIME, 221-242, 19-21 Şubat 1979.
- Terao, H., “Structure and Mechanical Properties
- of High-Manganese Dual-Phase Steels”, Journal
- of Materials Science, Cilt 21, 1715-1720, 1986.
- Matlock, D.K., Krauss, G., Ramos, L.F., Huppi,
- G.S., “A correlation of processing variables with
- deformation behavior of dual-phase steels”,
- Structure and properties of dual-phase steels,
- New Orleans, AIME, 62-90, 19-21 Şubat 1979.
- Speich, G.R. ve Miller, R.L., “Mechanical
- Properties of Ferrite-Martensite Steels”,
- Structure and properties of dual-phase steels,
- New Orleans, AIME, 145-182, 19-21 Şubat 1979.
- Sarwar, M., Ahmad, E., Qureshi, K.A., Manzoor,
- T., “Influence of epitaxial ferrite on the tensile
- properties of dual phase steel”, Materials &
- Design, Cilt 28, No 1, 335-340, 2007.
- Erdoğan, M., “The effect of new ferrite content
- on the tensile fracture behaviour of dual phase
- steels”, Journal of Materials Science, Cilt 37,
- -3630, 2002.
- Steinbrunner, D.L., Matlock, D.K., Krauss, G.,
- “Void formation during tensile testing of dual
- phase steels”, Metallurgical Transaction A, Cilt
- A, 579-589, 1988.
Toplam 109 adet kaynakça vardır.
Ayrıntılar
| Birincil Dil | Türkçe |
|---|---|
| Bölüm | Makaleler |
| Yazarlar | |
| Yayımlanma Tarihi | 20 Şubat 2013 |
| Gönderilme Tarihi | 20 Şubat 2013 |
| Yayımlandığı Sayı | Yıl 2011 Cilt: 26 Sayı: 2 |