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Hot deformation characteristics and hot working window of as-cast large-tonnage GH3535 superalloy ingot

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Journal of Materials Science & Technology 2018年第12期34卷 2439-2446页

作者： Yao Wang Junsong Wang jiasheng dong Aimin Li Zhijun Li Guang Xie Langhong Lou Superalloys Division Institute of Metal ResearchChinese Academy of Sciences Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences College of Materials Science and Chemical Engineering Harbin Engineering University Technology Center Fushun Special Steel Shares Co.LTD. Thorium Molten Salts Reactor Center Shanghai Institute of Applied PhysicsChinese Academy of Sciences

Deformation characteristics and range of optimized hot working parameters of a 6.5 tons GH3535 superalloy ingot with an average columnar grain size of over 1 mm in diameter were investigated. Axial compression experiments were performed in temperature range of 900-1240 ℃ and strain rate range of 0.001-30 s;at a total strain of 0.8. The hot deformation activation energy of the experimental GH3535 alloy is calculated to be 483.22 kJ/mol. Furthermore, the deformation constitutive equation is established by the peak stresses obtained from the stress-strain curves under various conditions. The hot working window of the alloy ingot at a strain of 0.8 can be preliminarily discussed based on the deformed microstructures and processing maps. The optimized hot working window was thus determined at the strain of 0.95 for 6.5 tons GH3535 alloy ingot by the supplementary compression tests. A large-size GH3535 superalloy ring with a dimension of 03010 mm x 410 mm was ultimately manufactured.

关键词： Ni-base superalloy Dynamic recrystallization Hot working Large-tonnage ingot Processing map

Preparation and Properties of a Novel Water Soluble Core Material

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Journal of Materials Science & Technology 2010年第3期26卷 270-275页

作者： Weiguo Jiang,jiasheng dong,Langhong Lou,Ming Liu and Zhuangqi Hu Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A novel water-soluble core material composed of polyethylene glycol,sodium chloride,mica powder and plasticizer was *** compressive strength,bend strength,hygroscopic coefficient and the material solubility in water were *** results show that the compressive yield strength of the soluble core can reach 1 MPa and the highest compressive strength can reach 4 MPa,the bend strength is as high as 6.65 MPa,the hygroscopic coefficient is lower than 0.22%/month and the solubility of suitable core material is 35.7-55.75 g/（min·m 2）.The wax pattern with undercuts was prepared successfully by using the novel water-soluble core material.

关键词： Investment cast Core materials Mechanical properties Microstructure

Pedicled or Free Flap from Contralateral Breast for Autologous Breast Reconstruction

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Chinese Journal of Plastic and Reconstructive Surgery 2020年第2期2卷 103-106页

作者： Jinguang HE Tao WANG Hua XU Yi ZHANG Ying LIU jiasheng dong Department of Plastic and Reconstructive Surgery Shanghai Ninth People’s HospitalShanghai Jiaotong University School of Medicine

Background Through precise understanding of the vascular anatomy of the breast,the lower segment of the breast could be harvested as a pedicled or free flap for contralateral breast *** presentation In case 1,based on the 4th internal thoracic artery perforator,the pedicled flap from the breast was transferred to the contralateral side for immediate breast *** case 2,with the thoracoacromial vascular pedicle,the free flap from the healthy breast was harvested for delayed breast reconstruction on the contralateral *** Both flaps survived well postoperatively.A certain degree of asymmetry was observed in both cases,but the patients were satisfied with the overall *** the end of follow-up,no tumor recurred in either *** In patients with a large healthy breast,the lower segment could be harvested as a pedicled or free flap for contralateral breast reconstruction.

关键词： Breast reconstruction Contralateral lower breast Pedicled Free

Using the parietal branch of superficial temporal vessels:A good approach to total ear replantation

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Chinese Journal of Plastic and Reconstructive Surgery 2022年第1期4卷 28-30页

作者： Ying Liu Yi Zhang Jiao Wei Tingliang Wang jiasheng dong Chuanchang Dai Hua Xu Department of Plastic and Reconstructive Surgery Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China

Although ear reconstruction is a mature procedure,emergency microsurgical replantation has still been regarded as the optimal treatment for ear amputation due to its cost-effectiveness and aesthetically pleasing *** microsurgical ear replantation is rare because of the difficulty in identifying suitable vessels for *** describe two cases of total ear microsurgical replants using the parietal branch of the superficial temporal vessels(STV)as the recipient *** STV parietal branch was dissected up to a sufficient length after thorough debridement,and the amputated ears were revascularized using end-to-end *** experience shows that the parietal branch of the STV is an ideal recipient vessel option for total ear replantation.

关键词： Microsurgical replantation Ear amputation Superficial temporal vessels

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单晶高温合金共晶溶解行为的差热分析

金属学报 2021年第12期57卷 1559-1566页

作者：张少华谢光董加胜楼琅洪中国科学院金属研究所师昌绪先进材料创新中心沈阳110016

选用一种第二代单晶高温合金,基于差示扫描量热技术(DSC),采用对比法测量了铸态和完全热处理态样品的升温DSC曲线,研究了保温过程中单晶合金中γ′相、γ/γ′共晶相的相变温度变化规律。结果表明,1290和1300℃保温过程中,随着保温时间... 详细信息

选用一种第二代单晶高温合金,基于差示扫描量热技术(DSC),采用对比法测量了铸态和完全热处理态样品的升温DSC曲线,研究了保温过程中单晶合金中γ′相、γ/γ′共晶相的相变温度变化规律。结果表明,1290和1300℃保温过程中,随着保温时间的延长,γ′相溶解温度和γ/γ′共晶相熔化温度先显著提高,然后缓慢增加。1300℃保温过程中,γ/γ′共晶体积分数随保温时间延长而逐渐降低。而1290℃保温过程中,随保温时间延长,共晶体积分数出现了先降低后增加的反常现象,这与金相实验方法相吻合。分析表明,枝晶间粗大γ′相未完全溶解,造成枝晶轴Ta元素向枝晶间扩散,促使共晶长大,从而使共晶体积分数增加。

关键词：单晶高温合金差示扫描量热技术固溶热处理共晶相变

Pt-Al涂层对一种镍基单晶高温合金抗热腐蚀行为的影响

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金属学报 2021年第6期57卷 780-790页

作者：王迪王栋谢光王莉董加胜陈立佳沈阳工业大学材料科学与工程学院沈阳110870 中国科学院金属研究所师昌绪先进材料创新中心沈阳110016

采用电镀Pt和化学气相沉积渗铝法在一种镍基单晶高温合金表面制备Pt-Al涂层,该涂层为单一β-(Ni,Pt)Al相结构。选用涂盐法分别在无涂层和Pt-Al涂层试样表面涂覆Na2SO4盐,并在900℃常压炉中进行热腐蚀实验。通过热腐蚀动力学、热腐蚀产... 详细信息

采用电镀Pt和化学气相沉积渗铝法在一种镍基单晶高温合金表面制备Pt-Al涂层,该涂层为单一β-(Ni,Pt)Al相结构。选用涂盐法分别在无涂层和Pt-Al涂层试样表面涂覆Na2SO4盐,并在900℃常压炉中进行热腐蚀实验。通过热腐蚀动力学、热腐蚀产物、热腐蚀宏观表面形貌和微观结构的对比,分析Pt-Al涂层对镍基单晶高温合金热腐蚀行为的影响。采用XRD、SEM、EDS和EPMA等检测方法进行分析。实验结果表明:经900℃热腐蚀后,Pt-Al涂层可以提高基体合金的抗热腐蚀性能,Pt-Al涂层试样的热腐蚀速率小于无涂层试样;β-(Ni,Pt)Al相中的Pt原子能够抑制S原子向β-(Ni,Pt)Al相中扩散,将S原子阻隔在氧化物-金属界面处,从而降低基体合金的热腐蚀速率;Pt原子也能够将大量难熔的Ta原子阻隔在互扩散区内,仅有少量的Ta原子扩散到氧化物中,减少了Ta2O5的形成;此外,Pt-Al涂层能够在一定程度上抑制氧化膜-金属界面处孔洞的形成。

关键词： Pt-Al涂层热腐蚀单晶高温合金镍基合金

NiSO_4和Nacl含量对电镀Ni溶液分散能力和Ni沉积层的影响

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金属学报 2008年第3期44卷 341-345页

作者：曲文生张功楼琅洪董加胜杨柯中国科学院金属研究所沈阳110016

通过测量极化和分散能力,对以Watts型电镀Ni溶液为基础的几种溶液进行了研究,考察了NiSO_4和NaCl含量的影响,并采用SEM和XRD方法对Ni沉积层形貌及其结晶择优取向进行了分折.结果表明,综合考虑电导率和极化度的乘积,是显著提升溶液分散... 详细信息

通过测量极化和分散能力,对以Watts型电镀Ni溶液为基础的几种溶液进行了研究,考察了NiSO_4和NaCl含量的影响,并采用SEM和XRD方法对Ni沉积层形貌及其结晶择优取向进行了分折.结果表明,综合考虑电导率和极化度的乘积,是显著提升溶液分散能力的重要途径;电沉积Ni镀层表面形貌主要受控于溶液中阴离子种类和数量,其晶粒尺寸和择优取向受控于过电位.

关键词：电导率分散能力 Ni沉积层择优取向

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含Cu铁素体抗菌不锈钢的抗菌性能

材料研究学报 2005年第6期19卷 581-588页

作者：吕曼祺陈四红董加胜杨柯中国科学院金属研究所

含Cu铁素体抗菌不锈钢在抗菌热处理过程中析出ε-Cu相,具有抗菌功能．抗菌处理的条件影响析出相的数量和形貌,从而影响其抗菌特性．在时效温度较低时,抗菌析出相基本上呈球形,随着时效温度的升高,析出相逐渐变为长条形并与铁素体基体... 详细信息

含Cu铁素体抗菌不锈钢在抗菌热处理过程中析出ε-Cu相,具有抗菌功能．抗菌处理的条件影响析出相的数量和形貌,从而影响其抗菌特性．在时效温度较低时,抗菌析出相基本上呈球形,随着时效温度的升高,析出相逐渐变为长条形并与铁素体基体保持某种取向关系．在抗菌不锈钢抗菌过程的前期,抗菌性能表现为对细菌生长和繁殖的抑制,后期表现为对细菌的杀灭．

关键词：金属材料抗菌性能不锈钢富Cu相

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铼对镍基单晶高温合金恒温氧化行为的影响

材料研究学报 2017年第9期31卷 695-702页

作者：常剑秀王栋董加胜王迪吴汉昌张功楼琅洪西安石油大学材料科学与工程学院西安710065 中国科学院金属研究所沈阳110016 中国航发贵阳中航动力精密铸造有限公司贵阳550014

采用不连续增重法研究了Re对一种镍基单晶高温合金1000℃恒温氧化行为的影响,采用扫描电镜(SEM)和X射线衍射分析仪(XRD)对样品的组织进行了观察。结果表明,两种合金生成的氧化膜成分相似,都生成了以含Cr、Ti氧化物为主的外氧化层、Al_2... 详细信息

采用不连续增重法研究了Re对一种镍基单晶高温合金1000℃恒温氧化行为的影响,采用扫描电镜(SEM)和X射线衍射分析仪(XRD)对样品的组织进行了观察。结果表明,两种合金生成的氧化膜成分相似,都生成了以含Cr、Ti氧化物为主的外氧化层、Al_2O_3内氧化层以及含有TiN的内氮化层。但二者氧化速率及氧化层结构存在较大差异,含Re合金的氧化速率较慢,Al_2O_3层较完整且TiN数量较少。Re的作用机理在于它提高了合金中Cr的活度,增大氧化膜中Cr_2O_3的含量,加快Al的选择性氧化,促进合金氧化膜内部连续Al_2O_3层的形成,抑制合金内部氮化物的生成,提高长期氧化下氧化膜的稳定性。

关键词：金属材料镍基单晶高温合金高温氧化 Re 活度选择性氧化