Exploring the Impact of Gadolinium on Microstructure, Thermodynamics, Mechanical Behavior, and Specific Heat Capacity in CuAlTa Shape Memory Alloy

Ercan Ercan; Ibrahim Nazem Qader; Fethi Dağdelen; Mediha Kök

Article Details

Exploring the Impact of Gadolinium on Microstructure, Thermodynamics, Mechanical Behavior, and Specific Heat Capacity in CuAlTa Shape Memory Alloy

Authors:

Ercan Ercan | Ibrahim Nazem Qader | Fethi Dağdelen | Mediha Kök

Publisher:

Bitlis Eren University

Main Topics:

Material Physics

Journal:

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Vol.14 Issue 2, pp.794-805

Document Type:

Article

Publication Date:

6/2025

Document Language:

English

Document ID (Org No.):

2001351275

pISSN:

2147-3129

Keywords:

Abstract:

 The surface morphology, microstructure, phase transition and specific heat capacity C_P T of the alloys produced by enriching CuAlTa shape memory alloys with Gadolinium Gd were examined depending on temperature changes. This study shows that alloy composition and phase behavior are closely related to high martensitic phase transformation temperature PTT. The addition of Gd to the alloys reduces the crystal size and significantly reduces the 18R phase. This relationship enables the design of new materials with customized properties. EDS analysis confirms the precipitation of tantalum in the β phase, as a result of its limited solubility in the matrix, effectively preventing the martensitic phase transformation. Therefore, the PTT increased by increasing Gd additive in the alloy. On the other hand, increasing Gd in the alloy causes the surface under martensitic transformation to decrease, and as a result, it reduces the stability of the shape recovery effect, causing the C_P T to increase.

 The surface morphology, microstructure, phase transition and specific heat capacity C_P T of the alloys produced by enriching CuAlTa shape memory alloys with Gadolinium Gd were examined depending on temperature changes. This study shows that alloy composition and phase behavior are closely related to high martensitic phase transformation temperature PTT. The addition of Gd to the alloys reduces the crystal size and significantly reduces the 18R phase. This relationship enables the design of new materials with customized properties. EDS analysis confirms the precipitation of tantalum in the β phase, as a result of its limited solubility in the matrix, effectively preventing the martensitic phase transformation. Therefore, the PTT increased by increasing Gd additive in the alloy. On the other hand, increasing Gd in the alloy causes the surface under martensitic transformation to decrease, and as a result, it reduces the stability of the shape recovery effect, causing the C_P T to increase.

 The surface morphology, microstructure, phase transition and specific heat capacity C_P T of the alloys produced by enriching CuAlTa shape memory alloys with Gadolinium Gd were examined depending on temperature changes. This study shows that alloy composition and phase behavior are closely related to high martensitic phase transformation temperature PTT. The addition of Gd to the alloys reduces the crystal size and significantly reduces the 18R phase. This relationship enables the design of new materials with customized properties. EDS analysis confirms the precipitation of tantalum in the β phase, as a result of its limited solubility in the matrix, effectively preventing the martensitic phase transformation. Therefore, the PTT increased by increasing Gd additive in the alloy. On the other hand, increasing Gd in the alloy causes the surface under martensitic transformation to decrease, and as a result, it reduces the stability of the shape recovery effect, causing the C_P T to increase.

 CuAlTa şekil hafızalı alaşımlarının Gadolinyum Gd ile zenginleştirilmesiyle üretilen alaşımların yüzey morfolojisi, mikro yapısı, faz geçişi ve özgül ısı kapasitesi C_P T sıcaklık değişimlerine bağlı olarak incelenmiştir. Bu çalışma, alaşım bileşiminin ve faz davranışının yüksek martensitik faz dönüşüm sıcaklığı PTT ile yakından ilişkili olduğunu göstermektedir. Alaşımlara Gd ilavesi kristal boyutunu küçültmekte ve 18R fazını önemli ölçüde azaltmaktadır. Bu ilişki, özelleştirilmiş özelliklere sahip yeni malzemelerin tasarlanmasını mümkün kılmaktadır. EDS analizi, matristeki sınırlı çözünürlüğü sonucu β fazında tantal çökelmesini doğrulayarak martensitik faz dönüşümünü etkili bir şekilde önlemektedir. Bu nedenle alaşımdaki Gd katkısının artırılmasıyla PTT artmıştır. Öte yandan alaşımdaki Gdnin artırılması martensitik dönüşüm altındaki yüzeyin azalmasına neden olmakta ve bunun sonucunda şekil hatırlama etkisinin kararlılığını azaltarak C_P Tnin artmasına neden olmaktadır.

Article Details

Exploring the Impact of Gadolinium on Microstructure, Thermodynamics, Mechanical Behavior, and Specific Heat Capacity in CuAlTa Shape Memory Alloy

Authors:

Ercan Ercan | Ibrahim Nazem Qader | Fethi Dağdelen | Mediha Kök

Publisher:

Bitlis Eren University

Main Topics:

Material Physics

Journal:

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Vol.14 Issue 2, pp.794-805

Document Type:

Article

Publication Date:

6/2025

Document Language:

English

Document ID (Org No.):

2001351275

pISSN:

2147-3129

Cu-Al-Ta-Gd

shape memory alloy

high temperature phase transformation

specific heat capacityCu-Al-Ta-Gd

şekil hatırlamalı alaşımlar

yüksek sıcaklık faz geçişi

özgül ısı kapasitesi

Issues

Article Details

Authors: Ercan Ercan | Ibrahim Nazem Qader | Fethi Dağdelen | Mediha Kök

Publisher: Bitlis Eren University

Main Topics: Material Physics

Journal: Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Vol.14 Issue 2, pp.794-805

Document Type: Article

Publication Date: 6/2025

Document Language: English

Document ID (Org No.): 2001351275

pISSN: 2147-3129

Issues

Authors:

Ercan Ercan | Ibrahim Nazem Qader | Fethi Dağdelen | Mediha Kök

Publisher:

Bitlis Eren University

Main Topics:

Material Physics

Journal:

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Vol.14 Issue 2, pp.794-805

Document Type:

Article

Publication Date:

6/2025

Document Language:

English

Document ID (Org No.):

2001351275

pISSN:

2147-3129