Issue 65

S. R. Sreenivasa et alii, Frattura ed Integrità Strutturale, 65 (2023) 178-193; DOI: 10.3221/IGF-ESIS.65.12

Wear Loss (gms) = 0.0451852 - 0.00553333 Wt. % + 0.000433333 Load + 2.53333e-005 Sliding Distance (1) COF (µ) = 0.400741 + 0.0608889 Wt. % - 0.00466667 Load - 0.000168889 Sliding Distance (2) Within the constraints of the process parameters employed in the current inquiry, the regression analysis and equations are applied to forecast the results. Comparisons between predicted and experimentation results are displayed in graphical representations to assess the accuracy of predicted values. Figs. 9 and 10 show the results of the experimental and predicted values of wear loss and COF of the created hybrid MMCs. Plots show that there is a stronger correlation between experimental and predicted values [52].

Figure 9: Comparison between experimental v/s. predicted values for wear loss.

Figure 10: Comparison between experimental v/s. predicted values for COF. Confirmation test trials were carried out for evaluation of wear rate and COF of developed hybrid composite. Optimum levels of the factors were selected from MEP for Means. Tab. 7 depicts values of optimal level for carrying out of confirmatory test trials and Tab. 8 depicts the results of confirmatory tests trials.

Parameters / Factors Optimized Values (wear loss) Optimized Values (COF)

TiB 2 (wt. %)

Load (N)

Sliding Distance (m)

7.5

15

750

2.5 1250 Table 7: Optimal parameters for confirmatory test trials of wear loss and COF. 45

OA Exp. outcomes

Confirmatory Exp. outcomes 0.019 (grams)

Error (%)

Characteristics TiB 2 (wt. %) Load (N) Sliding Distance (m)

Wear loss

7.5

15

750

0.020 (grams)

5

COF

2.5

45

1250

0.15 (µ)

0.16 (µ)

6.25

Table 8: Confirmatory outcomes of wear loss and COF.

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