| The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel | |
| Sun, Chen1,2; Fu, Paixian1; Liu, Hongwei1; Liu, Hanghang1; Du, Ningyu1,2; Cao, Yanfei1 | |
| Corresponding Author | Fu, Paixian(pxfu@imr.ac.cn) ; Cao, Yanfei(yfcao10s@imr.ac.cn) |
| 2020-03-01 | |
| Source Publication | CRYSTALS
 |
| ISSN | 2073-4352 |
| Volume | 10Issue:3Pages:12 |
| Abstract | Different austenitizing temperatures were used to obtain medium-carbon low-alloy (MCLA) martensitic steels with different lath martensite microstructures. The hierarchical microstructures of lath martensite were investigated by optical microscopy (OM), electron backscattering diffraction (EBSD), and transmission electron microscopy (TEM). The results show that with increasing the austenitizing temperature, the prior austenite grain size and block size increased, while the lath width decreased. Further, the yield strength and tensile strength increased due to the enhancement of the grain boundary strengthening. The fitting results reveal that only the relationship between lath width and strength followed the Hall-Petch formula of. Hence, we propose that lath width acts as the effective grain size (EGS) of strength in MCLA steel. In addition, the carbon content had a significant effect on the EGS of martensitic strength. In steels with lower carbon content, block size acted as the EGS, while, in steels with higher carbon content, the EGS changed to lath width. The effect of the Cottrell atmosphere around boundaries may be responsible for this change. |
| Keyword | medium-carbon low-alloy steel lath martensite effective grain size strength carbon content |
| Funding Organization | National Natural Science Foundation of China ; Project to Strengthen Industrial Development at the Grass-roots Level ; Independent & Controllable Manufacturing of Advanced Bearing ; Innovation project of the cutting-edge basic research and key technology by SYNL ; Young Talent Project by SYNL ; China Postdoctoral Science Foundation |
| DOI | 10.3390/cryst10030232 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51701225] ; Project to Strengthen Industrial Development at the Grass-roots Level[TC190A4DA/35] ; Independent & Controllable Manufacturing of Advanced Bearing ; Innovation project of the cutting-edge basic research and key technology by SYNL[L2019R36] ; Young Talent Project by SYNL[L2019F33] ; China Postdoctoral Science Foundation[2019M661153] |
| WOS Research Area | Crystallography ; Materials Science |
| WOS Subject | Crystallography ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000523512100031 |
| Publisher | MDPI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/137942 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Fu, Paixian; Cao, Yanfei |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| Recommended Citation GB/T 7714 | Sun, Chen,Fu, Paixian,Liu, Hongwei,et al. The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel[J]. CRYSTALS,2020,10(3):12. |
| APA | Sun, Chen,Fu, Paixian,Liu, Hongwei,Liu, Hanghang,Du, Ningyu,&Cao, Yanfei.(2020).The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel.CRYSTALS,10(3),12. |
| MLA | Sun, Chen,et al."The Effect of Lath Martensite Microstructures on the Strength of Medium-Carbon Low-Alloy Steel".CRYSTALS 10.3(2020):12. |
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