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学者姓名：陈子勇
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摘要 ：
研究了B和Y对Ti45Al8Nb0.2W0.25Cr (at%)合金的微观结构、微观偏析和拉伸行为的影响。结果表明,高铌Ti Al合金中的β相稳定元素促进了微观偏析区域中γ相以及大块状微观偏析区域的形成。具有低比表面积的大块状微偏析区域降低了微偏析界面处的空洞和裂纹的成核率,明显降低了晶界处的强度和合金的抗拉强度。B和Y的添加明显的细化了片层团,增加了片层团处空洞成核的机会,从而提高了变形抗力。分析了2种合金的拉伸机理。
关键词 ：
TiAl TiAl 微观偏析 微观偏析 组织 组织 拉伸 拉伸
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| GB/T 7714 | 宫子琪 , 武晋 , 孙伟 et al. B和Y对高铌TiAl合金组织和拉伸性能的影响（英文） [J]. | 稀有金属材料与工程 , 2021 , 50 (08) : 2760-2764 . |
| MLA | 宫子琪 et al. "B和Y对高铌TiAl合金组织和拉伸性能的影响（英文）" . | 稀有金属材料与工程 50 . 08 (2021) : 2760-2764 . |
| APA | 宫子琪 , 武晋 , 孙伟 , 陈子勇 , 聂祚仁 . B和Y对高铌TiAl合金组织和拉伸性能的影响（英文） . | 稀有金属材料与工程 , 2021 , 50 (08) , 2760-2764 . |
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摘要 ：
Ti-6.5Al-2.5Sn-9Zr-0.5Mo-0.25Si-1Nb-1W-0.1Er-xB (x = 0, 0.1, 0.2, 0.4, 0.6 and 0.8 wt%) with different boron contents are fabricated for investigation. Influences of boron element and its amounts on phase constitutions, microstructures, textures and compression mechanical properties are carefully studied. With the increasing boron additions, contents of TiB phase increase, and the maximum intensities of textures decrease. Microstructures are significantly and continuously refined after adding boron element and with the increasing boron additions, and turning point of refinement rates for different microstructural parameters is found at 0.2 wt% boron content. Strengths increase monotonously, while elongations increase firstly and decrease afterwards. The maximum value of elongation is acquired at boron content of 0.2 wt%. On the premise of ensuring plasticity, 0.2 wt% boron content is the most appropriate amount for microstructural refinement and mechanical properties enhancement for current near alpha titanium alloys. Meanwhile, aspect ratios of TiB whiskers increase with the increasing boron contents. Lots of near equiaxed alpha grains or alpha grains with irregular morphologies are discovered around TiB phase. Distorted and twisted alpha grain boundaries are also obviously detected in boron containing alloys. Moreover, premature fracture of alloys containing TiB whiskers is largely influenced by the fracture of these brittle reinforcements. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词 ：
Boron element Boron element Fracture behaviors Fracture behaviors Mechanical properties Mechanical properties Microstructures Microstructures Near alpha titanium alloy Near alpha titanium alloy Textures Textures
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| GB/T 7714 | Ma, Xiaozhao , Xiang, Zhilei , Tan, Chao et al. Influences of boron contents on microstructures and mechanical properties of as-casted near alpha titanium alloy [J]. | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2021 , 77 : 1-18 . |
| MLA | Ma, Xiaozhao et al. "Influences of boron contents on microstructures and mechanical properties of as-casted near alpha titanium alloy" . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 77 (2021) : 1-18 . |
| APA | Ma, Xiaozhao , Xiang, Zhilei , Tan, Chao , Wang, Zhitian , Liu, Yingying , Chen, Ziyong et al. Influences of boron contents on microstructures and mechanical properties of as-casted near alpha titanium alloy . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2021 , 77 , 1-18 . |
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摘要 ：
The influence of B and Y on the microstructure, microsegregation, and tensile behaviour of the Ti45A18Nb0.2W0.25Cr (at%) alloy was investigated. The beta-stabilizer elements in the high-Nb TiAl alloy promote the formation of the gamma phase in the microsegregation region and lead to the formation of large blocky microsegregation areas. The large blocky microsegregation regions with low specific surface areas reduce the nucleation rate of cavities and cracks at the interfaces of the microsegregation, which are harmful to colony boundary strengthening and decrease tensile resistance. The addition of B and Y affords an obvious refinement in the lamellar colony, renders an increasing opportunity for cavity nucleation at the colony boundary, and thus improves the tensile resistance. The tensile mechanisms of the alloys before and after (B, Y) addition were also compared and analysed.
关键词 ：
microsegregation microsegregation microstructure microstructure tension tension TiAl TiAl
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| GB/T 7714 | Gong Ziqi , Wu Jin , Sun Wei et al. Effects of B and Y Additions on the Microstructure and Tensile Behaviour of High-Nb TiAl Alloys [J]. | RARE METAL MATERIALS AND ENGINEERING , 2021 , 50 (8) : 2760-2764 . |
| MLA | Gong Ziqi et al. "Effects of B and Y Additions on the Microstructure and Tensile Behaviour of High-Nb TiAl Alloys" . | RARE METAL MATERIALS AND ENGINEERING 50 . 8 (2021) : 2760-2764 . |
| APA | Gong Ziqi , Wu Jin , Sun Wei , Chen Ziyong , Nie Zuoren . Effects of B and Y Additions on the Microstructure and Tensile Behaviour of High-Nb TiAl Alloys . | RARE METAL MATERIALS AND ENGINEERING , 2021 , 50 (8) , 2760-2764 . |
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摘要 ：
TiB2 particles clusters evolution, mechanical properties and strengthening mechanisms of in situ 6wt% TiB2/Al-Zn-Mg-Cu composites subjected by two-step deformation process were studied. The results suggest that large TiB2 clusters and belts can hinder elements dissolution and diffusion, leading to partial transformation from T phase to S phase. Two-step orthogonal deformation can effectively break the TiB2 clusters to release the wrapped phases, which is conductive to solution process. Low fraction of residual T and S phases, broken brittle phases and uniform TiB2 distribution are in favor of mechanical properties. In T6 state, eta' and GP II are the main reinforcement phases, which can contribute to yield strength about 355.30 MPa estimated by strengthening model, dislocation reinforcement contribution is about 112.70 MPa. The 6wt% TiB2/Al-Zn-Mg-Cu composite subjected two-step deformation owns an excellent mechanical performance, 616.96 MPa (UTS), 552.00 MPa (YS), 9.67% (EL). Comparably, UTS, YS and EL of that improve by 16%, 15%, 265% in radial direction and 12%, 18%, 87% in axial direction than forged composite.
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| GB/T 7714 | Huang, Jingcun , Xiang, Zhilei , Li, Jihao et al. Effect on microstructure and mechanical properties of in situ 6 wt%TiB2/Al-Zn-Mg-Cu composite subjected by two-step orthogonal deformation process [J]. | JOURNAL OF MATERIALS RESEARCH , 2021 . |
| MLA | Huang, Jingcun et al. "Effect on microstructure and mechanical properties of in situ 6 wt%TiB2/Al-Zn-Mg-Cu composite subjected by two-step orthogonal deformation process" . | JOURNAL OF MATERIALS RESEARCH (2021) . |
| APA | Huang, Jingcun , Xiang, Zhilei , Li, Jihao , Ma, Xiaozhao , Yang, Zian , Shen, Gaoliang et al. Effect on microstructure and mechanical properties of in situ 6 wt%TiB2/Al-Zn-Mg-Cu composite subjected by two-step orthogonal deformation process . | JOURNAL OF MATERIALS RESEARCH , 2021 . |
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摘要 ：
2D forging processes are adopted to tailor the microstructures and mechanical properties of near ? titanium alloys with different boron contents and the evolutions of the microstructures and mechanical properties of the acquired alloys are carefully characterised. Maximum texture intensities decrease with increasing boron contents, thereby illustrating the improvements in the homogeneity of the microstructures. The distribution of TiB whiskers in the 3D space exhibits a near-columnar arrangement around boundaries of squashed and elongated prior 13 grains along the stretching direction. Increases in the contents of equiaxed ? grains with increasing TiB contents are ascribed to enhancements in recrystallisation due to the promotion effects of the TiB phase and increases in 13 transus temperatures. Boron exhibits excellent refinement effects on the alloy matrices, and the refinement degree increases with increasing boron contents. The proportions of low-angle grain boundaries decrease whilst the corresponding proportions of high-angle grain boundaries increase with increasing boron contents. The ultimate and yield strengths of the alloys increase at room temperature (RT) and 650 ?C. Elongations exhibit a decreasing trend at RT but are maintained at 650 ?C. At RT, cleavage fractures of the TiB whiskers determine the evolution law of elongation. The fracture characteristics of alloy matrices exhibit a transformation from a mixture of tearing lamellae and dimples to dimples only. At 650 ?C, the alloy matrices are characterised by ductile fractures with numerous dimples. Er containing particles facilitate the fracture of alloy through cooperative effects with TiB whiskers.
关键词 ：
2D forging Textures Mechanical properties Fracture behaviors Er containing particles 2D forging Textures Mechanical properties Fracture behaviors Er containing particles
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| GB/T 7714 | Ma, Xiaozhao , Xiang, Zhilei , Li, Jihao et al. Influence of 2D forging processes and boron contents on the microstructures and mechanical properties of near ? titanium alloys [J]. | INTERMETALLICS , 2021 , 133 . |
| MLA | Ma, Xiaozhao et al. "Influence of 2D forging processes and boron contents on the microstructures and mechanical properties of near ? titanium alloys" . | INTERMETALLICS 133 (2021) . |
| APA | Ma, Xiaozhao , Xiang, Zhilei , Li, Jihao , Chen, Ziyong , Shu, Qun . Influence of 2D forging processes and boron contents on the microstructures and mechanical properties of near ? titanium alloys . | INTERMETALLICS , 2021 , 133 . |
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摘要 ：
通过透射电镜研究了X2A66铝锂合金单极时效过程中析出相的演变并进行量化统计,讨论了析出相的强化机制,结果表明,X2A66铝锂合金在165℃单级人工时效的欠时效至峰值时效过程中析出相的析出序列为:α过饱和固溶体→GP区+δ'+GPT1→δ'+θ'+GPT1→θ'+T1+δ'。时效温度为165℃,时效时间为72 h是X2A66铝锂合金的峰值时效,此时抗拉强度为591 MPa,延伸率为6.88%。T1相为X2A66铝锂合金时效过程中的主要强化相,位错与T1相间的交互作用为切过和绕过的混合型。在峰值时效条件下,T1相的体积分数为17%,T1相强度增量为124.8 MPa,T1相的强化贡献占析出相强化...
关键词 ：
析出相 析出相 X2A66铝锂合金 X2A66铝锂合金 时效 时效 强化机制 强化机制
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| GB/T 7714 | 史国栋 , 周俊 , 王云峰 et al. X2A66铝锂合金时效过程中析出相演变及强化机制 [J]. | 固体火箭技术 , 2020 , 43 (05) : 618-623 . |
| MLA | 史国栋 et al. "X2A66铝锂合金时效过程中析出相演变及强化机制" . | 固体火箭技术 43 . 05 (2020) : 618-623 . |
| APA | 史国栋 , 周俊 , 王云峰 , 王圆圆 , 陆政 , 陈子勇 . X2A66铝锂合金时效过程中析出相演变及强化机制 . | 固体火箭技术 , 2020 , 43 (05) , 618-623 . |
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摘要 ：
研究了X2A66铝锂合金在高温变形过程中的微观组织及析出相的演变规律。结果表明,在变形温度为420℃,应变速率为0.01s~(–1)时,在变形初期,X2A66铝锂合金基体中亚晶组织不完整,同时出现少量动态再结晶晶粒;随着变形量增加,可以观察到平直且清晰的晶界,当变形量大于80%时,部分晶界内出现大量位错,在析出相周围产生位错缠结。X2A66在高温变形过程中T_1相出现破碎回溶的现象,同时在变形过程中动态析出δ'相。T_1相的破碎回溶使基体重新达到过饱和状态,尤其是Li元素的过饱和促进了δ'相的析出。处于晶界内部的析出相能阻碍位错运动,提升再结晶晶粒的形核率。钉扎在晶界上的析出相能有效阻碍晶界及...
关键词 ：
再结晶 再结晶 高温变形 高温变形 微观组织 微观组织 析出相 析出相 X2A66铝锂合金 X2A66铝锂合金
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| GB/T 7714 | 史国栋 , 王璞光 , 王云峰 et al. X2A66铝锂合金高温变形过程中的微观组织演变 [J]. | 航空制造技术 , 2020 , 63 (07) : 22-27 . |
| MLA | 史国栋 et al. "X2A66铝锂合金高温变形过程中的微观组织演变" . | 航空制造技术 63 . 07 (2020) : 22-27 . |
| APA | 史国栋 , 王璞光 , 王云峰 , 王圆圆 , 陆政 , 陈子勇 . X2A66铝锂合金高温变形过程中的微观组织演变 . | 航空制造技术 , 2020 , 63 (07) , 22-27 . |
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摘要 ：
一种超高强铝合金挤压棒材及其制备方法，属于铝合金材料制备技术领域。以Al‑Zn‑Mg‑Cu‑Zr‑Er合金为基体，按下述步骤进行：①按合金成分配料进行熔炼，然后浇铸到既定好的模具中；②利用单辊甩带法将Al‑Zn‑Mg‑Cu‑Zr‑Er合金铸锭制备成超细晶合金带材；③超细晶合金带材经过高速万能粉碎机后，冷压成圆柱体；④将冷压后的合金圆柱体进行热挤压加工，得到挤压棒材。本发明易于大量制备超细晶挤压棒材，具有较好的实用价值，制备出的超高强铝合金挤压棒材有较高的抗拉强度和延伸率，同时为热处理态的高强高韧铝合金打下良好的基础。
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| GB/T 7714 | 陈子勇 , 申高亮 , 相志磊 et al. 一种超高强铝合金挤压棒材及其制备方法 : CN202011461626.4[P]. | 2020-12-08 . |
| MLA | 陈子勇 et al. "一种超高强铝合金挤压棒材及其制备方法" : CN202011461626.4. | 2020-12-08 . |
| APA | 陈子勇 , 申高亮 , 相志磊 , 赵悦清 , 马小昭 , 黄景存 et al. 一种超高强铝合金挤压棒材及其制备方法 : CN202011461626.4. | 2020-12-08 . |
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摘要 ：
采用重熔稀释法制备了Al-7Si-0.5Mg-0.1Er和0.5TiB2/Al-7Si-0.5Mg-0.1Er合金,研究了Ti B2颗粒增强Al-Si-Mg-Er复合材料的组织性能。结果表明,复合材料铸态组织主要由α-Al基体、共晶Si相和Ti B2颗粒组成。Ti B2粒子的加入使Al-7Si-0.5Mg-0.1Er合金二次枝晶间距减小了7.1μm。抗拉强度达到217.53 MPa,较Al-7Si-0.5Mg-0.1Er合金提升了12.1%。Ti B2/Al-Si-Mg-Er复合材料的最优T6热处理工艺为530℃×12 h固溶+160℃×7 h时效,经该工艺处理后,Ti B2/Al-Si-Mg...
关键词 ：
组织 组织 Al-Si-Mg-Er合金 Al-Si-Mg-Er合金 热处理 热处理 复合材料 复合材料 力学性能 力学性能 TiB_2颗粒 TiB_2颗粒
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| GB/T 7714 | 杨子安 , 相志磊 , 陈子勇 et al. TiB_2/Al-Si-Mg-Er复合材料的组织与性能 [J]. | 金属热处理 , 2020 , 45 (12) : 142-148 . |
| MLA | 杨子安 et al. "TiB_2/Al-Si-Mg-Er复合材料的组织与性能" . | 金属热处理 45 . 12 (2020) : 142-148 . |
| APA | 杨子安 , 相志磊 , 陈子勇 , 任伟敏 , 马小昭 . TiB_2/Al-Si-Mg-Er复合材料的组织与性能 . | 金属热处理 , 2020 , 45 (12) , 142-148 . |
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摘要 ：
The microstructures and mechanical properties of a new type near α high temperature titanium alloy Ti-6.5Al-2.5Sn-9Zr-0.5Mo-0.25Si-1Nb-1W-0.3Re (wt. %) (denoted as TA6.5) were investigated. It was observed that the microstructure of forged TA6.5 mainly consisted of deformed lamellar α phase, small amount of equiaxed α phase, and residual β phase, exhibiting high strength and comparatively low elongation. Three different heat treatments processes were performed on forged TA6.5. The results showed that all heat treated alloys displayed high tensile strengths, and the values of strength parameters were almost unchanged with the increasing solution temperature, ascribing to the combination effects of decreasing primary α phase and increasing contents and widths of secondary α phase and lamellas. The tensile elongations of heat treated alloys tested at 650 decreased slightly with the increasing solution temperature, which is due to the increased width of secondary α lamellas and the generation of coarse grain boundary α phase. TA6.5 treated in the process of 990 /1 h/AC+700 /4 h/AC exhibited excellent comprehensive mechanical properties, i.e. the ultimate tensile strength of 829 MPa, yield strength of 707 MPa and elongation of 18.73% respectively. © 2020 Trans Tech Publications Ltd, Switzerland.
关键词 ：
Elongation Elongation Grain boundaries Grain boundaries Tensile strength Tensile strength Textures Textures Titanium alloys Titanium alloys
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| GB/T 7714 | Cui, Yapeng , Chen, Ziyong , Ma, Xiaozhao et al. Microstructures and mechanical properties of a new type of high temperature titanium alloy [C] . 2020 : 208-216 . |
| MLA | Cui, Yapeng et al. "Microstructures and mechanical properties of a new type of high temperature titanium alloy" . (2020) : 208-216 . |
| APA | Cui, Yapeng , Chen, Ziyong , Ma, Xiaozhao , Liu, Yingying , Xiang, Zhilei , Chai, Lihua . Microstructures and mechanical properties of a new type of high temperature titanium alloy . (2020) : 208-216 . |
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