Study on the microstructure and mechanical properties of Aermet 100 steel at the tempering temperature around 482 °C

Shi, Xiaohui; Zeng, Weidong; Zhao, Qinyang; Peng, Wenwen; Kang, Chang-Yong

doi:10.1016/j.jallcom.2016.04.087

Cited by 57 publications

(12 citation statements)

References 21 publications

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“…This promotes appreciable solid solution strengthening along the joint interface during the post-weld heat treatment. The retained austenite along the joint interface would relieve the local stress concentration and reduce the chance of microcrack formation in the steel during deformation [36].…”

Section: Elementmentioning

confidence: 99%

“…Accompanied by the stable and complex structures of dislocation tangle where the pinning effects could restrain the grain boundaries' gliding and migration, it could also reduce the stress concentration and prevent the initiation of grain boundary crack, thus the joint strength was increased [31,38]. In addition, the plasticity of joints slightly improved and the local stress concentrations probably released, owing to retained austenite formed at the joint region [36], and no phase transformation occurred in the retained austenite. Although a few voids were observed at the joint interface after tempering treatment, no failure occurred.…”

Section: Tensile Tests Of Jointsmentioning

confidence: 99%

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Diffusion Bonding of 9Cr Martensitic/Ferritic Heat-Resistant Steels with an Electrodeposited Ni Interlayer

Gao

Wang

Liu

et al. 2018

Metals

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In this paper, diffusion bonding was adopted to join 9Cr martensitic/ferritic heat-resistant steels using an electrodeposited Ni interlayer with a thickness of 40 μm. In addition, the effect of tempering treatment after diffusion bonding on the microstructure evolution and mechanical properties of the bonding joints was investigated. It was found that a transition region with face-centered cubic (FCC) structure was formed between the steel and Ni interlayer. The transition region was the solid solution of (γFe,Ni) rich in Ni component, being related to martensite in the base metal by the Kurdjumov–Sachs (K-S) orientation relationship. No intermetallic compounds were detected at the bonding joints before and after tempering treatment. After tempering treatment, the transition region had higher dislocation density than other regions, due to the higher pinning effect of solute atoms acting on the dislocation than that of the matrix. Tensile tests indicated that tempering treatment improved the mechanical properties of the joint, since the samples after tempering treatment fractured in the base metal, whereas the specimens without tempering treatment fractured at the joint interface.

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Section: Elementmentioning

confidence: 99%

Section: Tensile Tests Of Jointsmentioning

confidence: 99%

Diffusion Bonding of 9Cr Martensitic/Ferritic Heat-Resistant Steels with an Electrodeposited Ni Interlayer

Gao

Wang

Liu

et al. 2018

Metals

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show abstract

“…In these service conditions, A100 steel must have a high strength as well as a high toughness. The addition of Co and Ni imparts excellent strength and toughness to A100 steel [ 2 , 3 ]. These parts are usually formed by means of the hot forging process, so it is very important to study the hot deformation behavior of A100 steel [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Research on the Hot Deformation Process of A100 Steel Based on High-Temperature Rheological Behavior and Microstructure

Sun,

Qin,

Liu

et al. 2024

Materials

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To obtain the optimal hot deformation process, the rheological and dynamic recrystallization behaviors of A100 steel were researched through isothermal compression tests. Firstly, a Hensel-Spittel constitutive model was established based on the stress–strain curves. Secondly, dynamic recrystallization percentage and grain size models were established to identify the necessary conditions for complete dynamic recrystallization. Finally, microstructural analysis was employed to validate the accuracy of the recrystallization model. The results indicate that the flow stress is highly sensitive to both the strain rate and the temperature, and the HS model demonstrates a high predictive accuracy, with a correlation coefficient of 0.9914. There exists a contradictory relationship between decreasing the average grain size and increasing the recrystallization percentage. The higher the percentage of dynamic recrystallization, the larger the average grain size tends to be. This situation should be avoided when devising the actual processing procedures. The optimal hot working processes for achieving complete dynamic recrystallization and a smaller average grain size are as follows: a strain equal to or greater than 0.6, a temperature between 1193 and 1353 K, and a strain rate between 0.1 and 1 s−1.

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“…[6][7][8][9] Currently, the prevailing heat treatment procedure involving solution treatment followed by deep cryogenic treatment (DCT) and tempering is commonly employed to attain a microstructure consisting of refined lath martensite, nano-M 2 C(M = Mo, Cr, Fe) precipitates, and residual austenite films. [10,11] This treatment approach serves to enhance the strength and toughness characteristics of the materials. Presently, investigations concerning the evolution of microstructure and properties of secondary hardening steel primarily concentrate on the cold treatment and tempering stages.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructural Evolution on Mechanical Properties of Secondary Hardening Low‐Carbon High‐Alloy Bearing Steel

Wu,

Zhang

2023

steel research int.

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The hierarchical martensite structure of secondary hardening low‐carbon high‐alloy bearing steel at different solution temperatures is characterized in detail, and the effect of microstructural evolution on mechanical properties of the experimental steel is studied. The results show there are a large number of micron‐M6C at the boundary of the prior austenite grain when the solution temperature is 1,000–1,025 °C, which is conducive to hinder the growth of the prior austenite grain and produces smaller packets that improve the yield strength of the material. At the same time, such micron‐M6C is prone to stress concentration when the material is subjected to an external force load, which can severely reduce the material toughness. The M6C completely dissolves into the matrix when the solution temperature exceeds 1,050 °C, and the packets size grows rapidly with the prior austenite grain size. At this point, the effect of packets on yield strength no longer dominates, and the rate of decrease in yield strength tends to be gradual. Under the comprehensive function of the micron‐M6C‐remelting, the martensitic blocks refinement, the increased number of the Σ3 grain boundaries, and the growth of cracks can be hindered, and the toughness of material can be improved accordingly.

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Study on the microstructure and mechanical properties of Aermet 100 steel at the tempering temperature around 482 °C

Cited by 57 publications

References 21 publications

Diffusion Bonding of 9Cr Martensitic/Ferritic Heat-Resistant Steels with an Electrodeposited Ni Interlayer

Diffusion Bonding of 9Cr Martensitic/Ferritic Heat-Resistant Steels with an Electrodeposited Ni Interlayer

Research on the Hot Deformation Process of A100 Steel Based on High-Temperature Rheological Behavior and Microstructure

Effect of Microstructural Evolution on Mechanical Properties of Secondary Hardening Low‐Carbon High‐Alloy Bearing Steel

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