کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7216760 | 1470225 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Heterogeneous microstructure evolution in Ti-6Al-4V alloy thin-wall components deposited by plasma arc additive manufacturing
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Several Ti-6Al-4V layers were deposited using pulsed plasma arc additive manufacturing (PAM). Epitaxial growth of prior β columnar grain is inhibited by pulsed perturbation, which results in formation of columnar grain with near-equiaxed grains. The horizonal layer bands (LBs) is observed after depositing 6 layers, which is absent in prior three layers. LB region deposited by PAM can be attributed to the precipitation of secondary α nano dispersoids growing along {10-10} orientation, which finally turn into α colonies under sufficient thermal cycles in the both range of β-transus and recrystallisation temperatures. Dispersion strengthening of the α lamellae with α nano contributes to an increase in the microhardness. The phase transformation (βâ¯ââ¯Î±) follows Burges oriention relationship resulting in triangular stars or rhombic patterns analysised by Electron Backscattered Diffraction.413
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 157, 5 November 2018, Pages 200-210
Journal: Materials & Design - Volume 157, 5 November 2018, Pages 200-210
نویسندگان
Jianjun Lin, Dengji Guo, Yaohui Lv, Yuxin Liu, Xiaoyu Wu, Bin Xu, Gang Xu, Binshi Xu,