Journals / Uluslararası Mühendislik Araştırma ve Geliştirme Dergisi / 2015 / Cilt: 7 - Sayı: 4

Dubleks Paslanmaz Çeliklerde Sigma Fazının Korozyon Dayanımına Etkileri

Pages
2–7
Publication Date
2015-12-15
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

For this purpose; 800°C was adjusted as heat treatment temperature and two seperate specimens were heated through 5,5 and 16 hours of duration time in consequenceof the most rapidly formation rate of sigma phase at this temperature.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Duplex stainless steels consistsof approximately half austenitic and half δ-ferritic phases and are preferred due to applications demanding both satisfactory corrosion and strength properties versus solely ferritic and austenitic grades.
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Key Findings & Data:In this work; deleterious sigma phase that may form in microstructures of S32205 (2205) duplex stainless steel plates was intended to be quantified after various thermal conditions such as heat treatments, welding and service life and also the effects of sigma phase on microstructural and corrosion properties were investigated.
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Conclusion & Impact:For this purpose; 800°C was adjusted as heat treatment temperature and two seperate specimens were heated through 5,5 and 16 hours of duration time in consequenceof the most rapidly formation rate of sigma phase at this temperature.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Dubleks Paslanmaz Çelik · SigmaFazı · Paslanmaz Çeliklerde Korozyon

Abstract

Duplex stainless steels consistsof approximately half austenitic and half δ-ferritic phases and are preferred due to applications demanding both satisfactory corrosion and strength properties versus solely ferritic and austenitic grades. In this work; deleterious sigma phase that may form in microstructures of S32205 (2205) duplex stainless steel plates was intended to be quantified after various thermal conditions such as heat treatments, welding and service life and also the effects of sigma phase on microstructural and corrosion properties were investigated. Sigma phase was formed in two distinct raw material by applying heat treatments, and microstructural and corrosion states were analyzed. For this purpose; 800°C was adjusted as heat treatment temperature and two seperate specimens were heated through 5,5 and 16 hours of duration time in consequenceof the most rapidly formation rate of sigma phase at this temperature.

Özet

Dubleks paslanmaz çelikler; delta-ferrit ve östenit fazlarının yaklaşık olarak yarı-yarıya bir arada bulunduğu ve ferritik ile östenitik türlere göre yeterli korozyon dayanımı ve mukavemet özelliklerinin bir arada istendiği uygulamalarda tercih edilmektedir.Bu çalışmada; dubleks paslanmaz çeliklerde ısıl işlem ve kaynakuygulaması veya kullanım ömrü süresince değişen termal koşullara göre mikro yapıda oluşabilecek zararlı fazlardan olan sigma fazının tespit edilmesi ve korozyon davranışlarına etkilerinin incelenmesi amaçlanmıştır. Sigma fazı iki ayrı ana malzemede ısıl işlem ile oluşturulmuş, mikro yapısal ve korozyon davranış durumları incelenmiştir. Bu amaçla; sigma fazının en hızlı oluştuğu 800°C sıcaklığı ısıl işlem amacıyla seçilmiş ve iki ayrı numuneye 5,5 saat ve 16 saat sürelerle ısıl işlem uygulanmıştır. Bu sıcaklıkta bekleme süresinin sigma fazının miktarına ve korozyon dayanımına etkileri de araştırılmıştır.

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Cite This Article

BAŞYİĞİT, A. B., KURT, A. (2015). Dubleks Paslanmaz Çeliklerde Sigma Fazının Korozyon Dayanımına Etkileri. Uluslararası Mühendislik Araştırma ve Geliştirme Dergisi, Cilt: 7 - Sayı: 4, 2–7. https://ajindex.com/articles/889565

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