کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5465628 | 1517571 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and characterization of refractory TiZrNbWMo high-entropy alloy coating by laser cladding
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A novel refractory high-entropy alloy (HEA) coating with composition close to TiZrNbWMo was synthesized on 45 # steel by laser cladding. Constituent phases, microstructure, chemical composition and microhardness of the coatings before and after annealing were investigated by XRD, SEM, TEM, EDS and micro/Vickers hardness test, respectively. Results showed that the TiZrNbWMo coating was ~ 513 μm in thickness. The microstructure of the coatings exhibited typical dendritic and interdendritic structure. The coating was composed of a major body-centered cubic (BCC) solid solution and a small amount of β-TixW1 â x precipitated phase due to high-entropy affect and laser rapid solidification. Apart from enhanced fraction of β-TixW1 â x precipitation, the structure and BCC solid solution phases remained almost unchanged after annealing at 800 °C, 1000 °C, and 1200 °C for 20 h, indicating that the coating had high thermal stability. The microhardness of as-clad HEA coating reached around 700 HV0.5, which was three times of 45 # steel substrate. The coating microhardness increased significantly after annealing, which was due to the solid solution strengthening of BCC matrix and formation of β-TixW1 â x precipitation. Notably, the highest value was up to 1300 HV0.5 after heat treatment at 800 °C. Therefore, the HEA coatings showed high microhardness and resistance to softening.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 311, 15 February 2017, Pages 321-329
Journal: Surface and Coatings Technology - Volume 311, 15 February 2017, Pages 321-329
نویسندگان
Mina Zhang, Xianglin Zhou, Xiangnan Yu, Jinghao Li,