Investigation of fatigue crack propagation behavior of 5083 aluminum alloy under various stress ratios: Role of grain boundary and Schmid factor

Ma, Mingyang; Wang, Bing; Liu, Huiqun; Yi, Danqing; Shen, Fanghua; Zhai, Tianrui

doi:10.1016/j.msea.2019.138871

Cited by 50 publications

(16 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Six particles were tested and measured in this way, and their results are listed in Table 1, giving an average interface strength of 254 ± 61 MPa. This value is much larger than the critical resolved shear stress for Pillar B of ~95 MPa, calculated using an average Schmid factor of 0.3 for face-centered cubic Al [42]. In fact, all individual measurements are much larger than this critical resolved shear stress.…”

mentioning

confidence: 68%

In situ mechanical testing of an Al matrix composite to investigate compressive plasticity and failure on multiple length scales

et al. 2021

View full text Add to dashboard Cite

SiC particle reinforced Al matrix composites exhibit high strength, high wear resistance, and excellent high-temperature performance, but can also have low plasticity and fracture toughness, which limits their use in structural applications. This study investigates the plasticity and failure of such a composite on multiple length scales, from strain localization through a complex microstructure to the debonding of individual microparticles from the matrix. Three microscale pillars containing microstructures with different complexities and sizes/volume fraction of SiC particles were used to study the effect of these features on deformation. For the matrix, nanoscale intermetallic precipitates within the Al grains contribute most to the strengthening effect, and the Al grain boundaries are shown to be effective obstacles for preventing strain localization by dominant shear bands and, therefore, catastrophic failure. When shear localization occurs, SiC particles can then debond from the matrix if the shear band and interface are aligned. To investigate whether the interface is a weak point during catastrophic failure, a number of SiC particles were separated from the matrix with direct debonding tests, which yield an interface strength that is much higher than the critical resolved shear stress for a pillar exhibiting both shear localization and interface debonding. Therefore, the matrix-particle interface is ruled out as a possible weak point, and instead, shear localization is identified as the mechanism that can drive subsequent interface debonding.

show abstract

mentioning

confidence: 68%

In situ mechanical testing of an Al matrix composite to investigate compressive plasticity and failure on multiple length scales

et al. 2021

View full text Add to dashboard Cite

show abstract

“…This was attributed to the fact that the high Schmid factor represented the grain soft orientation, which was benefit for the crack initiation and propagation. However, the low Schmid factor hindered the crack growth, indicating that the grains showed the hard orientation 37 . Connolley et al 38 indicated that significant propagations were confined to just a few SCs in each sample, and showed that the initial da/dN of some propagation SCs were roughly in the same level.…”

Section: Resultsmentioning

confidence: 99%

“…However, the low Schmid factor hindered the crack growth, indicating that the grains showed the hard orientation. 37 Connolley et al 38 indicated that significant propagations were confined to just a few SCs in each sample, and showed that the initial da/dN of some propagation SCs were roughly in the same level. Hence, it was assumed that the initial da/dN of SC 2 and SC 4 were rough the same.…”

Section: Mechanism Of Multi-scs Propagation and The Division Of Scmentioning

confidence: 99%

Microstructural investigation and model of fatigue short crack in EH36 steels

Feng

et al. 2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

For better revealing the behavior and mechanism of fatigue short crack (SC) propagation, five different kinds of notched samples were designed. Based on the crack growth rate-SC length map, finite element method and electron backscatter diffraction (EBSD) pattern, the evolution theory of geometrically necessary dislocation density (ρ GND ) versus SC length was proposed to distinguish the physically short crack (PSC) length; Schmid factor was utilized to define the length of microstructurally short crack (MSC). Thus, the whole SC growth was divided into three parts: MSC, transition zone and PSC. Finally, an original piecewise model containing two parameters was proposed to describe the whole SC growth of EH36 steels.

show abstract

“…However, the previous two-driving-force models above cannot work for negative R; thus, a modified twodriving-force model was proposed to accommodate a wide range of R, 10,19,23 as expressed in Equation (3).…”

Section: Introductionmentioning

confidence: 99%

Influence of temperature on the R‐effect for the fatigue crack growth of nickel‐base superalloy GH4169

Liu

Yang

et al. 2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

The stress ratio (R) effect, especially at elevated temperatures, is associated with the fatigue crack growth (FCG) prediction in aero-engine hot-end components under complex operation conditions. The FCG experiments with three R were conducted on Ni-based superalloy GH4169 at room temperature (RT), 550 C, and 700 C. The results indicate that the R-effect on the FCG of GH4196 is temperature-dependent. Therefore, efforts were made to identify the R-effect at various temperatures to describe the FCG. The concept of the crack-closure or the two-driving-force was employed to quantify the R-effect considering the temperature influence. Fractographic analyses on the fracture surface were performed to discuss the underlying mechanism responsible for the temperature influence. The study can contribute to the R-dependent FCG modeling at various temperatures.

show abstract

Investigation of fatigue crack propagation behavior of 5083 aluminum alloy under various stress ratios: Role of grain boundary and Schmid factor

Cited by 50 publications

References 50 publications

In situ mechanical testing of an Al matrix composite to investigate compressive plasticity and failure on multiple length scales

In situ mechanical testing of an Al matrix composite to investigate compressive plasticity and failure on multiple length scales

Microstructural investigation and model of fatigue short crack in EH36 steels

Influence of temperature on the R‐effect for the fatigue crack growth of nickel‐base superalloy GH4169

Contact Info

Product

Resources

About