Fatigue in thin films: lifetime and damage formation

Kraft, O.; Schwaiger, Ruth; Wellner, P.

doi:10.1016/s0921-5093(01)00990-x

Cited by 171 publications

(81 citation statements)

References 13 publications

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“…All the findings reported so far are in line with the results obtained by other researchers on thin copper and silver films on polymeric and silicon oxide substrates. 1,2,5,9,39,40 It should however be mentioned that no cracking at grain boundaries could be observed, even in the thinnest 100 nm samples. This might be because the strain range was not as high as for the experiments reported in Refs.…”

Section: Discussionmentioning

confidence: 91%

“…A comprehensive study of the fatigue life of the films would require constructing S-N curves, which did not prove so far possible due to the limited number of samples available. From the literature, 5 it is expected that supported films follow the Coffin-Manson law, given a proper failure criterion is adopted. 9,10 The bulge fatigue technique could be conveniently used in the future to test this assumption on freestanding films.…”

Section: Discussionmentioning

confidence: 99%

“…3,4 The explanation that has been proposed for explaining the transition in cyclic deformation mechanisms is that the dimensional and microstructural constraints become too strong to allow the formation of organized dislocation structures. 5 The typical formation of extrusions as described by Mughrabi 6,7 for macroscopic samples is indeed based on the formation of persistent slip bands, which in bulk copper have a characteristic wall-spacing of 1.4 lm. 8 Since the yield strength of thinner films is also higher, these might not be able to deform plastically until a high stress is reached, which is larger than the stress needed for cracking at grain boundaries.…”

Section: Introductionmentioning

confidence: 90%

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Bulge fatigue testing of freestanding and supported gold films

Merle

Göken

2014

J. Mater. Res.

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The bulge test was used to investigate the fatigue properties of gold thin films with a thickness between 100 and 300 nm. The membranes were pressurized at a rate of 0.2 Hz up to 10 5 times, during which their stress and strain states were continuously recorded. Gold films on a silicon nitride substrate were cyclically loaded into tension and compression. Due to the presence of the substrate, no membrane failure was observed, but the residual stress shifted from an initially tensile state to an increasingly compressive one. Typical fatigue damage mechanisms consisting of extrusions were found in some large grains. Freestanding films were cyclically loaded in pure tension until failure occurred. The data acquired during the fatigue tests show a strong ratcheting of the films, which is indicative of cyclic plastic creep. Microstructural investigations clearly show grain boundary sliding in very thin films with columnar grains extending through the thickness.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

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Bulge fatigue testing of freestanding and supported gold films

Merle

Göken

2014

J. Mater. Res.

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“…High cycle fatigue (HCF) of thin films on polymer substrates has been studied in details in case of metallic films (especially Cu and Al) [58][59][60][61][62][63][64][65], whose damage state was primarily related to the grain structure. Fatigue studies of oxide films are much fewer and limited to conducting materials (especially Sn-doped In 2 O 3 , ITO) since these enable probing damage through electrical resistance measurement [66,67].…”

Section: High Cycle Fatigue Behavior Of Thin Oxide Films On Polymer Smentioning

confidence: 99%

Mechanical integrity of thin inorganic coatings on polymer substrates under quasi-static, thermal and fatigue loadings

et al. 2010

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The interplay between residual stress state, cohesive and adhesive properties of coatings on substrates is reviewed in this article. Attention is paid to thin inorganic coatings on polymers, characterized by a very high hygro-thermo-mechanical contrast between the brittle and stiff coating and the compliant and soft substrate. An approach to determine the intrinsic, thermal and hygroscopic contributions to the coating residual stress is detailed. The critical strain for coating failure, coating toughness and coating/substrate interface shear strength are derived from the analysis of progressive coating cracking under strain. Electrofragmentation and electro-fatigue tests in situ in a microscope are described. These methods enable reproducing the thermo-mechanical loads present during processing and service life, hence identifying and modeling the critical conditions for failure. Several case studies relevant to food and pharmaceutical packaging, flexible electronics and thin film photovoltaic devices are discussed to illustrate the benefits and limits of the present methods and models.

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“…For example, studies on pressure die casting dies [1,2] show that the surface damage in tool steels extends from the 300 µm into the bulk material (this thickness will hereafter be referred to as the "surface"). It is also known that the properties of materials of low thickness may be different from those of bulk materials [3][4][5]. It is thus proposed to study the crack initiation and propagation behaviour of the surface separately from the bulk Figure 1.…”

Section: An Investigation Of the Crack Propagation In Tool Steel X38cmentioning

confidence: 99%

An investigation of the crack propagation in tool steel X38CrMoV5 (AISI H11) in SET specimens

Shah¹,

Boher²,

Leroux³

et al. 2009

Rev. Met. Paris

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 2933 Any correspondence concerning this service should be sent to the repository administrator: staff-oatao@listes-diff.inp-toulouse.fr AbstractA method is proposed for the evaluation of surface fatigue damage of hot forming tools that undergo severe thermo mechanical loading. Crack propagation under fatigue loading in a X38CrMoV5-47HRC is investigated using specimens of 2.5*8 mm*mm section. The effect of thickness on crack propagation is investigated. The crack propagation experiments are performed at different R values on single-edge cracked tension s curves are established. Short crack propagation in thin specimens is also investigated. Numerical simulation and analysis of the specimens is performed by ABAQUS® Standard software. Evolution of the J integral with respect to the crack length is investigated. Crack closure along the whole crack length is observed by a microscope. Effect of slip bands on crack propagation mechanism is investigated.

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Fatigue in thin films: lifetime and damage formation

Cited by 171 publications

References 13 publications

Bulge fatigue testing of freestanding and supported gold films

Bulge fatigue testing of freestanding and supported gold films

Mechanical integrity of thin inorganic coatings on polymer substrates under quasi-static, thermal and fatigue loadings

An investigation of the crack propagation in tool steel X38CrMoV5 (AISI H11) in SET specimens

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