PSI - Issue 42

Pavel Doubek et al. / Procedia Structural Integrity 42 (2022) 1529–1536 Pavet Doubek et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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Table 5. Measured values of the Vickers hardness, results of Young‘s modulus and tensile strength for bi-material interface S960 and hard chrome Rockit 401, Vickers HV0.5 method, Lens 50×, RT Parameter Unit Value Distance to start point mm 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 Diagonal 1, set 1, d 1 S1 μm 38.992 39.701 38.637 39.346 39.523 39.168 42.182 41.473 42.536 Diagonal 2, set 1, d 2 S1 μm 38.107 38.637 37.042 39.346 39.701 38.814 42.536 41.118 42.891 Avg. diagonal, set 1, d S1 μm 38.549 39.169 37.840 39.346 39.612 38.992 42.359 41.296 42.714 Diagonal 1, set 2, d 1 S2 μm 37.219 37.042 38.814 38.283 39.523 40.410 41.650 42.359 42.005 Diagonal 2, set 2, d 2 S2 μm 38.992 38.637 38.283 38.283 39.878 42.182 41.296 43.778 42.005 Avg. diagonal, set 2, d S2 μm 38.549 39.169 37.840 39.346 39.612 38.992 42.359 41.296 42.714 Hardness HV0.5, set 1 – 624 604 648 599 591 610 517 544 508 Hardness HV0.5, set 2 – 639 648 624 633 588 544 539 500 525 HV0.5, arithmetic mean – 631.5 626 636 616 589.5 577 528 522 516.5 Young’s modulus, E s GPa 207.8 207.0 206.6 206.2 205.8 205.3 204.9 204.4 203.9 Tensile strength N/mm 2 2113 2091 2129 2054 1955 1908 1732 1708 1690

Parameter

Unit mm μm μm

Value

Distance to start point Diagonal 1, set 1, d 1 S1 Diagonal 2, set 1, d 2 S1

1.8

2.0

2.2

52.639 52.639 49.803 50.867 53.703 50.866 51.753 53.171 50.335 43.423 54.057 51.221 42.182 53.525 51.764 51.753 53.171 50.335

Avg. diagonal, set 1, d S1 μm Diagonal 1, set 2, d 1 S2 μm Diagonal 2, set 2, d 2 S2 μm Avg. diagonal, set 2, d S2 μm Hardness HV0.5, set 1 – Hardness HV0.5, set 2 – HV0.5, arithmetic mean – Young’s modulus, E s

346 506 426

328 320 324

366 350 358

GPa

203.5 1371

203.0 1042

202.5 1149

Tensile strength

N/mm 2

In Fig. 6 and 7, the dependences of the tensile strength on the distance to starting point when passing through the interface between the cladded layers and the steel substrate are plotted.

Fig. 6. The course of the tensile strength of the measured sample when aluminium bronze Metco 51NS is laser-cladded on the steel substrate

Fig. 7. The course of the tensile strength of the measured sample when hard chrome Rockit 401 is laser-cladded on the steel substrate