Cân Bằng Phase của Hợp Kim Ba Chất Al-Cu-Zn ở Phía Giàu Al-Zn

Journal of Phase Equilibria and Diffusion - Tập 39 - Trang 356-365 - 2018
Yuhui Zhang1, Fan Zhang1,2, Shuhong Liu1, Dandan Huang3, Yong Du1
1State Key Laboratory of Powder Metallurgy, Central South University, Changsha, People’s Republic of China
2School of Materials Science and Engineering, Xiangtan University, Xiangtan, People’s Republic of China
3Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, Nanning, People’s Republic of China

Tóm tắt

Cân bằng pha của hệ thống Al-Cu-Zn trên phía giàu Al-Zn đã được xác định thực nghiệm với 16 hợp kim được tôi luyện ở 360 °C. Các hợp kim đã được tôi luyện được kiểm tra bằng phương pháp nhiễu xạ tia X, phân tích vi điểm điện tử và nhiệt lượng kế quang vi sai. Năm vùng đơn pha và bảy vùng đa pha, cũng như ba vùng ba pha, cụ thể là α-(Al) + θ-Al2Cu + τ′-Al4Cu3Zn, α-(Al) + τ′-Al4Cu3Zn + ε-CuZn4 và α-(Al) + ε-CuZn4 + (Zn), đã được xác định. Mặt cắt đẳng nhiệt một phần của hệ Al-Cu-Zn trên phía giàu Al-Zn ở 360 °C đã được xây dựng dựa trên dữ liệu thực nghiệm thu được trong nghiên cứu này. Đã quan sát thấy rằng pha dung dịch rắn α-(Al) sẽ dễ dàng phân hủy thành ε-CuZn4, (Zn) và α′-(Al) ở nhiệt độ môi trường trong các giai đoạn đầu. Pha ba dòng τ′-Al4Cu3Zn sẽ hình thành và ε-CuZn4 sẽ d gradually biến mất theo sự kéo dài của thời gian già hóa.

Từ khóa

#Al-Cu-Zn #cân bằng pha #hợp kim ba chất #tôi luyện #phân tích vi điểm

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