PSI - Issue 47

Mario A. Sánchez Miranda et al. / Procedia Structural Integrity 47 (2023) 310–324 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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reduces porosities; particularly in the retreating side; nonetheless, excess on temperature may lead to excessive fusion and poor joining [36]. During FSW of dissimilar thermoplastics, the glassy temperature and melting temperature of each polymer plays a main role to optimize the pre-heating temperature (if any), in order to obtain the best mechanical properties of dissimilar joint of thermoplastics. In Table 4 are listed the higher tensile strengths for dissimilar joints UHMW-PP, subjected to tensile tests.

Figure 8. Tensile tests for the specimens: a) 1112, b) 1525, c) 2025, and d) 2525.

Table 4. High tensile strength results for dissimilar joints HMWPE-PP, using FSW.

Tensile strength (MPa)

Welding efficiency (%)

Modality

1112 1525 2025 2525 1512 2512

21.0 15.8 15.5 15.1 14.6 14.4 13.7

80.76 % 60.76 % 59.61 % 58.07 % 56.15 % 55.38 % 52.69 %

1512*