Non-inclusion induced crack initiation in multiphase high-strength steel during very high cycle fatigue

Pei, Zhao; Liu, Z.; Misra, R.D.K.; Du, Fanglin; Zhang, C.; Yang, Zhi; Yan, Erhu

doi:10.1016/j.msea.2017.11.119

Cited by 15 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fatigue property evaluation of materials and structures covers all fields of engineering, and the very high cycle fatigue (VHCF) properties related to the failure caused by defects or cracks have become a significant concentration of recent material design 1–3 . At present, the researches on the fatigue properties of steels under VHCF mainly focus on two aspects 4 . The first one is to develop different methods to enhance the VHCF strength of steel, such as alloy addition, 5 surface treatment, 6,7 and heat treatment 8 .…”

Section: Introductionmentioning

confidence: 99%

A fatigue life prediction approach to interior cracking induced high cycle and very high cycle fatigue for surface‐carburized steels

Zhang

Liu

et al. 2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

High cycle fatigue and very high cycle fatigue tests with pulsating tension for three surface‐carburized steels were performed to investigate interior failure behavior and life prediction method. As a result, all cracks with fine granular area and fisheye characteristics are induced from inclusions in matrix or in carburized layer. However, the later cracking morphology is smoother, which is due to the difference of plastic deformation and microstructure of the two regions. Based on estimation of threshold values for small and long crack growth, fatigue design curves are established. The maximum inclusion sizes of three carburizing steels were estimated by four statistical analysis methods. Combined with material microstructure characteristics and the critical plane theory, a failure‐based life prediction model is proposed by using fatigue indicator parameter, whose validity is verified based on good agreement between predicted and experimental ones.

show abstract

Section: Introductionmentioning

confidence: 99%

A fatigue life prediction approach to interior cracking induced high cycle and very high cycle fatigue for surface‐carburized steels

Zhang

Liu

et al. 2022

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…The influence of microstructure on crack propagation behavior in the high-performance steels has been an important research field [10]- [12]. Recently, Zhao et al [13] investigated the fatigue failure mechanism of a multiphase steel. They found that the crack initiation site within a multiphase structure was the dominant factor influencing the high fatigue strength.…”

Section: Introductionmentioning

confidence: 99%

Mouth-Like Cracking in a High-Strength Multiphase Steel and Its Relationship to Fracture Toughness

Wang

Gao

et al. 2021

Materials and Contact Characterisation X

View full text Add to dashboard Cite

The effect of microstructure on crack growth behaviour in steels has always been a subject of considerable research interest. Based on a quenching and partitioning process (Q&P), and the transformation of a nano-scaled bainite in advanced high-strength steels, a novel quenchingpartitioning-austempering process (Q-P-A) has been developed for manufacturing a multiphase microstructure in a medium carbon steel (55Mn2SiCr). The processing sequence consists of the following steps: austenitizing at 900°C for 0.5 h; controlled quenching and cooling to 200°C, i.e. slightly below Ms (the start temperature for martensite transformation) for 5 s; austempering at 170°C for 5 min; up-heating to 250°C for 120 min; final air cooling to room temperature. An ultimate tensile strength (UTS) above 2 GPa, as well as an acceptable elongation of 3%, is obtained due to a multiphase formation comprising prior martensite (PM), bainitic ferrite (BF), retained austenite (RA) and nanoscaled structure ((BF + RA(+C))nano). Mouth-like cracks are observed on the fracture surface and the crack arrest behavior is investigated. When a microstructural cluster with (BF + RA(+C))nano fully covered PM is formed, a mouth-like crack can be formed and a superior crack resistance can be obtained. The crack initiates from the PM boundary and propagates along the interface between the PM and (BF + RA(+C))nano over a distance of a few millimeters and before being arrested in the (BF + RA(+C))nano. This behaviour is mainly attributed to the uniform distribution of film RA and needle BF with nano-level spacing in the (BF + RA)nano. The stress concentration energy at the crack tip can be absorbed by the martensitic transformation of the film RA. The results are important when designing a multiphase microstructure for a commercial high-strength steel.

show abstract

“…(1) Zhao et al provided an understanding of non-inclusion-induced cracks in high-cycle fatigue and guidance for automotive steel fatigue design. (2) Zanon et al investigated the correlations between material properties altered by the laser cutting process and the behavior of automotive material subjected to high-cycle fatigue. (3) Gao et al studied the mutual and relative effects of inclusions and microstructures on the very high cycle fatigue behavior of automotive multiphase steels.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of High-cycle Fatigue Behavior for Automobile Structural Steel Based on Stress-Number-of-cycles Curves

Zhu¹,

Zheng²,

Zhao³

2019

Sensors and Materials

View full text Add to dashboard Cite

An experimental sensing system and performance analysis of the measurement of the highcycle fatigue properties of automobile structural steel are presented. Firstly, the yield strength and tensile strength of the automobile body stamping steel plate are determined through a static uniaxial tensile test. In accordance with the stress ratio R = 0.1, the stress at all levels is determined, and the tensile strength test based on stress is carried out. Secondly, the fatigue data obtained using Goodman's and Gerber's empirical formulas are modified to eliminate the effect of average stress. The fatigue analysis software program LabMOTION is used to acquire the stress-number-of-cycles (S-N) curves of the material under different failure probabilities, and the fatigue limit of the material is obtained as well. The experimental results indicate that this method can be used to obtain the real fatigue characteristics of materials and that the fatigue limit obtained through Gerber's empirical formula and the slope of the S-N curve of a finite-life region is more accurate. In this study, we provide a reference for future automobile body fatigue simulation analysis, parts design, and general product quality.

show abstract

Non-inclusion induced crack initiation in multiphase high-strength steel during very high cycle fatigue

Cited by 15 publications

References 33 publications

A fatigue life prediction approach to interior cracking induced high cycle and very high cycle fatigue for surface‐carburized steels

A fatigue life prediction approach to interior cracking induced high cycle and very high cycle fatigue for surface‐carburized steels

Mouth-Like Cracking in a High-Strength Multiphase Steel and Its Relationship to Fracture Toughness

Experimental Investigation of High-cycle Fatigue Behavior for Automobile Structural Steel Based on Stress-Number-of-cycles Curves

Contact Info

Product

Resources

About