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Microstructure and mechanical property regulation of hot-rolled Al-contained medium-Mn steel by double intercritical annealing
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Peining MAO1, Xingmin HUANG1, Chao LYU1, Junjie LIU1, Juan ZHANG2
Journal of Materials Engineering | 2026, 54(3) : 170 - 180
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Journal of Materials Engineering | 2026, 54(3): 170-180
• RESEARCH ARTICLE •
Microstructure and mechanical property regulation of hot-rolled Al-contained medium-Mn steel by double intercritical annealing
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Peining MAO1, Xingmin HUANG1, Chao LYU1, Junjie LIU1, Juan ZHANG2
Affiliations
  • 1.Key Laboratory of Advanced Technologies of Materials，Ministry of Education，School of Materials Science and Engineering，Southwest Jiaotong University，Chengdu 610031，China
  • 2.Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province，School of Mechanics and Aeronautics and Astronautics，Southwest Jiaotong University，Chengdu 610031，China
Published: 2026-03-20 doi: 10.11868/j.issn.1001-4381.2023.000733
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Usually，the initial microstructure of hot-rolled and quenched medium-manganese experimental steel is composed of lath martensite matrix and a small amount of tiny granular austenite， also existing apparent Mn-segregation bands. Using double intercritical annealing （holding 60 min at 750 ℃ followed by 60 min at 700 ℃）， austenite reversion transformation in Mn-rich and Mn-lean regions are modulated by stages， which efficiently promoting the refinement of retained austenite grains and the optimization of mechanical stability distribution without apparent variation of volume fraction of retained austenite. The results show that adequate and sustained strain-induced martensite transformation is favored and boosted during uni-axial tensile deformation. Due to synergistic toughening of transformation and twinning induced plasticity effects， excellent combination of strength and ductility， such as the ultra-high total elongation of 85.3% and product of strength and plasticity （PSE） of 73.4 GPa∙% are obtained eventually.

double intercritical annealing  /  Al-contained medium-Mn steel  /  Mn segregation  /  retained austenite  /  mechanical stability
毛沛宁, 黄兴民, 吕超, 刘俊杰, 张娟. 基于两步临界退火调控热轧含铝中锰钢的显微组织和力学性能. 材料工程, 2026 , 54 (3) : 170 -180 . DOI: 10.11868/j.issn.1001-4381.2023.000733
Peining MAO, Xingmin HUANG, Chao LYU, Junjie LIU, Juan ZHANG. Microstructure and mechanical property regulation of hot-rolled Al-contained medium-Mn steel by double intercritical annealing[J]. Journal of Materials Engineering, 2026 , 54 (3) : 170 -180 . DOI: 10.11868/j.issn.1001-4381.2023.000733
Appendix
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Year 2026 volume 54 Issue 3
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Article Info
doi: 10.11868/j.issn.1001-4381.2023.000733
  • Receive Date：2023-11-02
  • Online Date：2026-10-27
  • Published：2026-03-20
Article Data
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History
  • Received：2023-11-02
  • Accepted：2023-12-19
Funding
Affiliations
    1.Key Laboratory of Advanced Technologies of Materials，Ministry of Education，School of Materials Science and Engineering，Southwest Jiaotong University，Chengdu 610031，China
    2.Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province，School of Mechanics and Aeronautics and Astronautics，Southwest Jiaotong University，Chengdu 610031，China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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