YÜKSEK ENTROPİLİ ALAŞIMLAR: PRENSİPLER VE ALAŞIM TASARIMI

Öz

Çoğu geleneksel alaşım tek bir element üzerinde kurulmaktadır. Farklı türlerdeki alaşım elementleri bu ana element üzerine özellikleri geliştirmek amacıyla eklenir ve böylece tek bir ana element üzerinde dayanan alaşım aileleri oluşturulur. Yüksek entropili alaşımlarda farklı olarak alaşımlar beş veya daha fazla ana element içerirler. Yüksek entropi kavramı, sadece bir baskın öğeye dayanan klasik alaşımlama yaklaşımı ile elde edilemeyen benzersiz özelliklere sahip gelişmiş malzemeler geliştirmenin yeni bir yolunu ortaya koymaktadır. Bu makale, çekirdek etkileri, fazlar ve kristal yapıları, mekanik özellikler, notasyon ve üretim teknikleri de dahil olmak üzere YEA’ların bazı önemli yönlerini açıklamaktadır.

Anahtar Kelimeler

• Yüksek entropili alaşımlar,metaller ve alaşımlar,entropi,entalpi,katır eriyik

HIGH ENTROPY ALLOYS: PRINCIPLES AND ALLOY DESIGN

Abstract

Most conventional alloys are based on one principal element. Different types of alloying elements are added to the principal element to improve its properties, forming an alloy family based on the principal element. Unlike this, High-entropy alloys (HEAs) are alloys with five or more principal elements. The concept of high entropy introduces a new way of developing advanced materials with unique properties that cannot be achieved by a classical alloying approach based on one dominant element. This paper describes some important aspects of HEAs including core effects, phases and crystal structures, mechanical properties, notations, process techniques.

Keywords

• High entropy alloys,metals and alloys,entropy,enthalpy,solid solutions

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