Preparation and Mechanical Property of Tantalum Alloying Layer on Ti6Al4V Alloy
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Bibliographic record
Abstract
[Purposes] In order to improve the surface performance of Ti6Al4V (TC4) alloy, a double glow plasma surface alloying technology is used to prepare a tantalum alloying layer on its surface. Combined with Taguchi experimental design, the effect of process parameters on surface hardness of tantalum alloying layer is studied. [Methods] The characteristics of tantalum alloying layer were analyzed by optical microscopy, X-ray diffraction, scanning electron microscopy, and energy dispersive spectrometer. The mechanical properties of TC4 substrate and tantalum alloying layer were compared by using microhardness tester and nanoindentation instrument. [Results] The results show that the optimized process parameters include temperature of 750 ℃, source-cathode voltage difference of 350 V, and holding time of 2 h. The tantalum alloying layer obtained under the optimal process parameters is continuous, uniform, and compact, consisting mainly of α-Ta and intermetallic compounds. The surface hardness of the tantalum alloying layer is increased by about 3.2 times compared with that of the TC4 substrate. While the H/E and H3/E2 values were 2.1 times and 15.0 times those of the TC4 substrate, respectively. Therefore, double glow plasma surface alloying treatment with tantalum diffusion has significantly improved the resistance of TC4 alloy to local plastic deformation.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it