个人简介：
董其鹏，苏州大学沙钢钢铁学院高性能金属结构材料研究院，副研究员，硕士研究生导师。2018年博士毕业于北京科技大学冶金工程专业，3月入职苏州大学。目前主要从事变形铝合金材料强韧化与服役行为等研究工作。作为项目负责人先后主持国家自然科学基金、江苏省自然科学基金青年项目各一项，国家、江苏省博士后科学基金项目各一项，企业产学研合作项目四项，同时，参与国家自然科学基金联合基金重点项目、山东省重点研发计划等多项研发项目。已在《Metallurgical and Materials Transactions A》、《Materials Science and Engineering: A》等国内外知名学术期刊发表论文30余篇，其中第一/通讯作者SCI收录17篇，申报国家发明专利11项，已授权4项。
代表性论著：
(1) Ziwei Yao, Fangzhen Liu, Jianquan Ling, Qipeng Dong*, Jian Qin, Hiromi Nagaumi. Effect of floating grains on the deformed microstructure of Mn-and Cr-containing Al-Mg-Si-Cu alloys. Materials Letters, 2023, 330, 133393.
(2) Fangzhen Liu, Xiaohua Zhu, Jian Qin, Wei Zhou, Jianquan Ling, Qipeng Dong*, Jiamin Yu, Hiromi Nagaumi, Bo Zhang. Effect of Mn/Cr ratio on precipitation behaviors of α-Al (FeMnCr) Si dispersoids and mechanical properties of Al–Mg–Si–Cu alloys. Materials Science and Engineering: A, 2022, 860, 144269.
(3) Qipeng Dong, Xiaming Chen, Hiromi Nagaumi, Xiaonan Wang, Bo Zhang. Formation mechanism of macrosegregation in dissimilar-filler welding of aluminum alloys. Journal of Materials Research and Technology, 2022, 20, 26-34.
(4) Qipeng Dong, Jiongming Zhang, Yanbin Yin, Hiromi Nagaumi. Numerical simulation of macrosegregation in billet continuous casting influenced by electromagnetic stirring. Journal of Iron and Steel Research International, 2022, 29(4), 612-627.
(5) Qipeng Dong, Jun Xia, Xiaming Chen, Xinzhong Li, Bo Zhang, Hiromi Nagaumi. Macrosegregation Induced by Floating Grains in Direct-Chill Casting of Aluminum Alloys, Metallurgical and Materials Transactions B, 2021, 52(4): 1930-1936.
(6) Qipeng Dong, Xiaming Chen, Hiromi Nagaumi, Qingyu Zhang, Xiaonan Wang, Minqi Sheng, Bo Zhang, Xinzhong Li. Formation Mechanism of Layered Structure Near Fusion Boundary in Dissimilar-Filler Welding of Aluminum Alloys, Metallurgical and Materials Transactions A, 2021, 52(4): 1174-1179.
(7) Xiaming Chen, Qipeng Dong*, Zhenguang Liu, Xiaonan Wang, Qingyu Zhang, Zengrong Hu, HiromiNagaumi. Fe-bearing intermetallics transformation and its influence on the corrosion resistanceof Al–Mg–Si alloy weld joints, Journal of Materials Research and Technology, 2020, 9(6): 16116-16125.
(8) Qingyu Zhang, Qipeng Dong*, Xiaonan Wang, Zhijun Wang, Dongke Sun, Mingfang Zhu, Yuehong Qian, Hiromi Nagaumi. Predictions of solute mixing in a weld pool and macrosegregation formation during dissimilar-filler welding of aluminum alloys: Modeling and experiments. Journal of Materials Research and Technology, 2020, 9(6): 12080-12090.
(9) Qipeng Dong, Jiongming Zhang, Liang Qian, Yanbin Yin. Numerical modeling of macrosegregation in round billet with different microsegregation models, ISIJ International, 2017, 57(5): 814-823
(10) Qipeng Dong, Jiongming Zhang, Bo Wang, Xinkai Zhao. Shrinkage porosity and its alleviation by heavy reduction in continuously cast strand, Journal of Materials Processing Technology, 2016, 238: 81-88
研究方向及成果：
（一）铝合金DC铸造浮游晶形成机理
背景：大规格高质量均质铸锭制备是高性能铝材产品生产的关键。浮游晶作为影响铸锭质量的一项突出问题，严重影响最终产品的组织与性能均一性。深入理解浮游晶形成与演化机制，在此基础上开发科学调控方法，已成为大规格高质量均质铸锭制备亟需解决的一项技术瓶颈。本课题组基于微观组织与成分特征分析，探明了浮游晶特殊的混晶微观组织特征，同时基于数值模拟，揭示了DC铸造过程浮游晶运动行为与分布规律，并阐明了浮游晶形成机制及其对中心负偏析影响机理。
研究成果：
浮游晶特殊混晶微观组织特征
DC铸造过程浮游晶形成演化机理
论文发表
1. Dong Q, Chen X, Xia J, et al. Floating grain characterization and its effects on centerline segregation of direct-chill cast Al–Mg–Si alloy billets[J]. MATERIALS TRANSACTIONS, 2020, 61(12): 2386-2392.
2. Dong Q, Xia J, Chen X, et al. Macrosegregation Induced by Floating Grains in Direct-Chill Casting of Aluminum Alloys[J]. Metallurgical and Materials Transactions B, 2021, 52(4): 1930-1936.
（二）同/异种铝合金焊接接头成分与组织演化行为
背景：铝合金比强度高，具有优异的成型性、耐蚀性、可焊接性，且可回收循环使用，广泛应用于交通运输、海洋工程、航空航天等领域。铝合金工业应用中，零部件间焊接是一个重要环节。在同/异种铝合金焊接过程中，由于焊丝与母材、母材与母材间固有的成分差异，区域偏析已成为铝合金异种焊接的共性问题，不仅出现于MIG焊、CMT焊、激光焊等熔焊过程，还常见于搅拌摩擦焊等固态焊接接头，严重影响焊接接头组织性能。本课题针对铝合金CMT与激光焊接接头区域偏析及相关组织差异开展了深入研究，并对焊接过程区域偏析形成机理进行了详细阐明。
此外，研究表明由于部分熔化区(partially melted zone, PMZ)中析出了大尺寸的AlFeSi相，形成了大尺寸的点蚀坑，致使焊接接头在PMZ处发生断裂，疲劳强度降低了约30%。然而，对于PMZ中如何形成粗大的AlFeSi相和AlFeSi相的种类未进一步分析。因此，本课题针对6xxx系铝合金CMT焊接接头微观组织演化及其与耐蚀性本质关系进行了深入研究。
(a)焊缝横截面宏观Weck侵蚀结果，(b) 区域偏析EPMA分析，(c) 偏析区凝固路径
(a) 焊接过程熔滴过渡行为, (b) 熔池温度演化曲线, (c) 焊接过程示意图, (d)和(e) 异质混合诱导区域偏析形成机理图
焊接接头腐蚀形貌
焊接接头局部微观组织演化机理
论文发表
1. Zhang Q, Dong Q, Wang X, et al. Predictions of solute mixing in a weld pool and macrosegregation formation during dissimilar-filler welding of aluminum alloys: Modeling and experiments[J]. Journal of Materials Research and Technology, 2020, 9(6): 12080-12090.
2. Dong Q, Chen X, Nagaumi H, et al. Formation Mechanism of Layered Structure Near Fusion Boundary in Dissimilar-Filler Welding of Aluminum Alloys[J]. Metallurgical and Materials Transactions A, 2021, 52(4): 1174-1179.
3. Chen, X.-M.; Dong, Q.-P.; Liu, Z.-G.; Wang, X.-N.; Zhang, Q.-Y.; Hu, Z.-R.; Nagaumi, H. Fe-bearing intermetallics transformation and its influence on the corrosion resistance of Al–Mg–Si alloy weld joints. Journal of Materials Research and Technology 2020, 9, 16116-16125.
（三）全流程多尺度模拟仿真
背景：高性能新型铝合金材料开发不仅涉及初始的合金成分优化设计，还需开发高质量无缺陷铸锭熔铸技术、高效高质量热处理及变形加工制备工艺。这一复杂制备流程多发生于高温环境，不易直接观察和实验分析，对此，数值模拟成为研究这些复杂物理过程不可或缺的关键手段。本课题组针对高性能新型铝合金材料开发及其高效制备加工工艺，开展了全流程模拟仿真，包括热/动力学合金成分计算设计、DC铸造、挤压铸造、挤压及焊接等自原材料到成型产品全生命周期的仿真模拟研究。
铝合金DC铸造过程浮游晶运动行为与分布规律
焊缝偏析区凝固组织演化，（a-d）晶粒取向，（e-h）元素Mg浓度场
不同微观偏析模型下连铸宏观偏析预测结果
论文发表
1. Dong, Q.; Yin, Y.; Zhu, Z.; Nagaumi, H. Motion and Distribution of Floating Grain in Direct-Chill Casting of Aluminum Alloys: Experiments and Numerical Modeling. 2020, 13, 5379.
2. Dong, Q.; Zhang, J.; Qian, L.; Yin, Y. Numerical Modeling of Macrosegregation in Round Billet with Different Microsegregation Models. ISIJ International 2017, 57, 814-823,