کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8044516 | 1518920 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and mechanical properties of vacuum diffusion bonding joints for γ-TiAl based alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
Vacuum diffusion bonding (DB) of as-extruded Ti-47.5Al-Cr-V (at.%) alloy was carried out at 1000-1100â¯Â°C at a pressure of 10-30â¯MPa for 1-3â¯h, and the bonded joints were post-bond heat treated (PBHT) at 1360â¯Â°C for 0.5â¯h. Subsequently, the shear strength of all the joints was measured, and the microstructure was observed. The results showed that the shear strength and bonding interface quality of joints increased under as-bonded and PBHT conditions with the increase of each bonding parameter (temperature, pressure, and time). The shear strength of the base material was 486â¯MPa, and it was 665â¯MPa after PBHT. Furthermore, the maximum shear strength of the as-bonded joints was over 80% of that of the base material. After PBHT, the maximum strength of the joints was nearly equal to that of the base material. The fracture morphologies of the as-bonded and PBHT joints were analyzed, and the fracture mode was changed from transgranular fracture to intergranular fracture. The optimal bonding parameters were proposed: Tâ¯â¥â¯1050â¯Â°C, pâ¯â¥â¯20â¯MPa, and tâ¯â¥â¯2â¯h.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 150, April 2018, Pages 96-104
Journal: Vacuum - Volume 150, April 2018, Pages 96-104
نویسندگان
Zhihao Du, Kaifeng Zhang, Zhen Lu, Shaosong Jiang,