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| 1 | 选区激光熔化AZ91D镁合金的组织与性能显示文摘采用选区激光熔化技术制备了AZ91D镁合金,利用光学显微镜、扫描电镜和显微硬度计等研究了选区激光熔化AZ91D镁合金的组织与性能,并与传统铸造工艺进行了对比。结果表明,选区激光熔化制备的镁合金比常规铸造工艺所获得的晶粒更细小,显微硬度更高。同时,选区激光熔化工艺可以大幅提升AZ91D镁合金的抗拉强度与伸长率,性能指标远超传统铸件。 | 徐春杰 华心雨 马东 张凯军 李珍娇 程茜 屠涛 田军 张忠明 Dan Shechtman | 2021 | 铸造技术2021，42，9： | 4 |
| 2 | The deformation and fracture of Ti3Al at elevated temperatures显示文摘 | Harry A. Lipsitt Dan Shechtman Robert E. Schafrik | 1980 | Metallurgical Transactions A1980，，8： | 1 |
| 3 | The deformation and fracture of TiAl at elevated temperatures显示文摘 | Harry A. Lipsitt Dan Shechtman Robert E. Schafrik | 1975 | Metallurgical Transactions A1975，，11： | 1 |
| 4 | The deformation and fracture of TiAl at elevated temperatures显示文摘 | Harry A. Lipsitt Dan Shechtman Robert E. Schafrik | 1975 | Metallurgical Transactions A1975，，11： | 1 |
| 5 | 钆对Mg-8Li-4Zn-xGd合金铸态组织与力学性能的影响显示文摘采用锂盐熔剂保护熔铸Mg-8Li-4Zn-xGd(x=1,3,5)合金铸锭,研究钆含量对铸态合金组织和力学性能的影响。结果表明:Mg-8Li-4Zn-xGd合金基体由α-Mg(HCP)和β-Li(BCC)双相构成。随着钆含量的增加,Mg5Gd共晶相和Zn12Gd化合物相逐渐连成网状,将基体α+β双相隔离成20~40μm的等轴状或类似于铸铁中的共晶团状,可有效细化α-Mg相和连续的β-Li相;组织中大颗粒Mg2Zn11相弥散分布在β-Li相内,Mg51Zn20相分布在α-Mg晶界处;锌元素还可以在β-Li相中析出细小弥散分布的MgZn相,其数量随钆含量的增加而增加,可直接弥散强化β-Li相。此外,锌和钆对合金硬度的影响较大,随着钆含量的增加,合金的抗拉强度提高,但伸长率降低。 | 徐春杰 徐信锋 马涛 孟令楠 张忠明 SHECHTMAN Dan | 2020 | 中国有色金属学报2020，30，4： | 1 |
| 6 | In vitro antibacterial properties of magnesium metal against Escherichia coli , Pseudomonas aeruginosa and Staphylococcus aureus显示文摘 | Duane A. Robinson Ronald W. Griffith Dan Shechtman Richard B. Evans Michael G. Conzemius | 2009 | Acta Biomaterialia2009，，5： | 1 |
| 7 | The deformation and fracture of TiM at elevated tempera- tures 显示文摘 | Harry A Lipsitt Dan Shechtman Robert E Schafrik | 1975 | Metallurgical Transactions A1975，6，： | 1 |
| 8 | Microstructure and properties of ductile iron bars for plunger pump prepared by horizontal continuous casting process显示文摘Ductile iron bars(DIBs) with a diameter of 145 mm, used for plunger pump production, were made by the horizontal continuous casting(HCC). The microstructure of the samples cut at three locations with different distances away from the surface(~20 mm from the surface, half of the radius and the center of the HCCDIBs)were investigated. The mechanical properties were measured by tensile and torsion tests. Results show that after the spheroidization of graphite, the iron matrix incorporates the nodules of Format I, Size 8 close to the surface, Format I, Size 7 at the half of the radius from the surface, and Format II, Size 6 in the centre of the bar,according to the ASTM A247 standard. The content of pearlite in the matrix changes from 55%(~20 mm from the surface) to 70%(half of the radius) and 80%(the center of the HCCDIBs). The strengths in tension are 552, 607 and 486 MPa with the elongations of 12.5%, 10.5% and 5.8% in samples cut at these three locations from the surface to the centre, respectively. The strength in torsion is equal to 558, 551 and 471 MPa at corresponding torsion angles of 418°, 384° and 144° respectively to the same distance from the bar surface. Fracture in tension is manifested via crack propagation through the interface between graphite nodules and matrix(Mode I), while in torsion the fracture is caused by the shear of graphite nodules(Mode II). It is shown that the transition between two fracture modes is also dependent on the size of graphite nodule. Typically, fracture Mode I was observed for nodules of smaller diameter(less than 22.7 μm) and fracture Mode II was seen for nodules of greater diameter(more than 24.8 μm). | Chun-jie Xu Zhen Zhao Yu Lei Yong-hui Liu Zhong-ming Zhang Yan Li Dan Shechtman | 2019 | China Foundry2019，16，2： | 0 |
| 9 | Microstructure and properties of LZQT600-3 HCCDIBs for plunger pump cylinder显示文摘It is important to improve the comprehensive performance of the ductile iron bars(DIBs)for the cylinder block of the extra high pressure hydraulic plunger pump and accelerate the industrial application.In this work,the LZQT600-3 DIBs with the diameter of 145 mm were prepared by the horizontal continuous casting(HCC)process,that is,LZQT600-3 HCCDIBs.The microstructure and room temperature tensile properties of different sections[left-edge(surface layer),left-1/2R(left half of the radius),and the center of the HCCDIBs]were studied.The results show that the spheroidization of LZQT600-3 HCCDIBs matrix from the left-edge,left-1/2R to the center is at nodulizing grade II and above.As the cooling rate gradually decreases from surface to the center of the HCCIBs,the number of spheroidized graphite is gradually reduced,the size is gradually increased,the shape factor is decreased,and the pearlite content and lamellate spacing are increased.Along the horizontal direction of the section,the hardness of the material is distributed symmetrically around the center of the HCCDIBs.In the vertical direction,the hardness distribution in the center of the HCCDIBs is asymmetrical due to the gravity during the solidification process.Therefore,the microstructure in the lower part of the section solidifies relatively quickly.The left-edge has the best tensile mechanical properties,and the ultimate tensile strength,yield tensile strength and elongation are 597.3 MPa,418.5 MPa and 9.6%,respectively.The tensile fracture belongs to the ductile-brittle hybrid fracture.The comprehensive performances of LZQT600-3 HCCDIBs meet the actual application requirements of ultra-high pressure hydraulic plunger pump cylinder. | Chun-jie Xu Yuan-ying Jin Dong Ma Zhen Zhao Jia-wei Qi Shang Sui Xiang-quan Wu Can Guo Zhong-ming Zhang Yong-hui Liu Dan Shechtman | 2024 | China Foundry2024，21，2： | 0 |
| 10 | Additive manufacturing of magnesium and its alloys: process-formabilitymicrostructure-performance relationship and underlying mechanism显示文摘Magnesium and its alloys,as a promising class of materials,is popular in lightweight application and biomedical implants due to their low density and good biocompatibility.Additive manufacturing(AM)of Mg and its alloys is of growing interest in academia and industry.The domain-by-domain localized forming characteristics of AM leads to unique microstructures and performances of AM-process Mg and its alloys,which are different from those of traditionally manufactured counterparts.However,the intrinsic mechanisms still remain unclear and need to be in-depth explored.Therefore,this work aims to discuss and analyze the possible underlying mechanisms regarding defect appearance and elimination,microstructure formation and evolution,and performance improvement,based on presenting a comprehensive and systematic review on the relationship between process parameters,forming quality,microstructure characteristics and resultant performances.Lastly,some key perspectives requiring focus for further progression are highlighted to promote development of AM-processed Mg and its alloys and accelerate their industrialization. | Shang Sui Shuai Guo Dong Ma Can Guo Xiangquan Wu Zhongming Zhang Chunjie Xu Dan Shechtman Sergei Remennik Daniel Safranchik Rimma Lapovok | 2023 | International Journal of Extreme Manufacturing2023，5，4： | 0 |
| 11 | Enhanced strength-ductility synergy in a wire and arc additively manufactured Mg alloy via tuning interlayer dwell time显示文摘Strength-ductility trade-off is a common issue in Mg alloys. This work proposed that a synergistic enhancement of strength and ductility could be achieved through tuning interlayer dwell time(IDT) in the wire and arc additive manufacturing(WAAM) process of Mg alloy.The thermal couples were used to monitor the thermal history during the WAAM process. Additionally, the effect of different IDTs on the microstructure characteristics and resultant mechanical properties of WAAM-processed Mg alloy thin-wall were investigated. The results showed that the stable temperature of the thin-wall component could reach 290 ℃ at IDT=0s, indicating that the thermal accumulation effect was remarkable. Consequently, unimodal coarse grains with an average size of 39.6 μm were generated, and the resultant room-temperature tensile property was poor. With the IDT extended to 60s, the thermal input and thermal dissipation reached a balance, and the stable temperature was only 170 ℃, closing to the initial temperature of the substrate. A refined grain structure with bimodal size distribution was obtained. The remelting zone had fine grains with the size of 15.2 μm, while the arc zone owned coarse grains with the size of 24.5 μm.The alternatively distributed coarse and fine grains lead to the elimination of strength-ductility trade-off. The ultimate tensile strength and elongation of the samples at IDT=60s are increased by 20.6 and 75.0% of those samples at IDT=0s, respectively. The findings will facilitate the development of additive manufacturing processes for advanced Mg alloys. | Dong Ma Chunjie Xu Shang Sui Jun Tian Can Guo Xiangquan Wu Zhongming Zhang Dan Shechtman Sergei Remennik | 2023 | Journal of Magnesium and Alloys2023，11，12： | 0 |
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