Novel high-precision wax molecular diffusion coefficient correlation based on the diffusion laboratory apparatus coupled with differential scanning calorimeter

Zhu, Haoran; Lei, Yun; Yu, Pengfei; Li, Chuanxian; Yao, Bo; Yang, Shuang; Lu, Yingda; Peng, Haoping

doi:10.1016/j.fuel.2023.129452

Cited by 3 publications

(1 citation statement)

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“…Differential scanning calorimetry (DSC) has been the preferred technique for measuring kinetic data by numerous researchers because of its speed, dependability, and ease of use. One major benefit is that it requires a small sample size, which saves a lot of time [ 28 , 29 , 30 , 31 , 32 , 33 ]. In this paper, the kinetic equations are also constructed from DSC data.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Martensite/Austenite Decomposition during Tempering of Ultrafine Nano-Bainitic Steels

Qu,

Lei,

Chen

et al. 2024

Materials

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In this study, the decomposition of a martensite/austenite (M/A) microconstituent in bainitic steels was analyzed using differential scanning calorimetry (DSC) data in conjunction with Kissinger’s and Johnson–Mehl–Avrami–Kolmogorov (JMAK)’s formulas. In bainitic steel subjected to austempering heat treatment, the presence of an M/A microstructure adversely affects the mechanical properties. According to the kinetic equations derived, it is observed that after tempering the sample at 600 °C for 4000 s, the generation of each phase reaches its maximum. The SEM images taken before and after tempering reveal extensive decomposition of the M/A constituent in the microstructure. The proportion of the M/A microstructure decreased significantly from about 10% before tempering to less than 1% after. Additionally, the content of residual austenite also reduced nearly to zero. These observations are consistent with the predictions of the kinetic equations.

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