Figure 13
Stress evolution in the Ni(W)–Kapton film during tensile testing to a maximum elongation of 350 µm. The load is accommodated elastically during the first cycle up to 100 µm and the second cycle up to 200 µm. The 〈σ11〉 evolution demonstrates that the elastic regime extends up to 1900 MPa. The smaller slope during unloading as compared to loading can be understood as being the result of crack formation in the film (see text). |