| Atomic-scale investigation of interface structures in polysynthetically twinned TiAl single crystals | |
| He, Neng1; Cheng, Yongxin2; Yuan, Tian1; He, Lianlong1; Chen, Chunlin1,3; Qi, Zhixiang4; Chen, Yang4; Chen, Guang4; Ye, Hengqiang3 | |
| Corresponding Author | He, Lianlong(llhe@imr.ac.cn) ; Chen, Chunlin(clchen@imr.ac.cn) ; Qi, Zhixiang(zxqi@njust.edu.cn) |
| 2024 | |
| Source Publication | INTERMETALLICS
 |
| ISSN | 0966-9795 |
| Volume | 164Pages:8 |
| Abstract | Interface structures of gamma-TiAl/alpha(2)-Ti3Al and differently oriented gamma/gamma lamellae in PST-TiAl crystals with 0 degrees lamellar orientation have been systematically investigated on an atomistic scale using high-resolution scanning trans-mission electron microscopy. The gamma/alpha(2) lamellar interfaces are atomically abrupt and coherent except for steps with a height of even number (mainly two) of (111)gamma planes. These steps are associated with Shockley partial dislocations that slip on alternate (111)gamma or (0002)alpha(2) planes to accomplish the gamma (sic) alpha(2) transformation. Three kinds of gamma/gamma interface structures are all atomically flat and coherent. The gamma/gamma twin boundaries contain steps associated with Shockley and Frank partial dislocations, while there are usually no steps and mismatch dislocations on the gamma/gamma ordered boundaries and pseudo-twin boundaries. But there is a thin alpha 2 lamella with a thickness of two or three lattice cells sandwiched between some gamma/gamma ordered boundaries. More intriguingly, the gamma lamella terminated in the alpha 2 lamella, or vice versa, forms the flat and coherent (1 (1) over bar 00)alpha(2)/(1 (2) over bar1)gamma end interfaces with the existence of steps associated with dislocations. |
| Keyword | Polysynthetically twinned TiAl crystals Interface structures Steps Transformation High-resolution scanning transmission electron microscopy |
| Funding Organization | National Natural Science Foundation of China ; Basic and Applied Basic Research Major Programme of Guangdong Province, China ; Key Research Program of Frontier Sciences, CAS |
| DOI | 10.1016/j.intermet.2023.108090 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[52201031] ; National Natural Science Foundation of China[52125101] ; National Natural Science Foundation of China[92163215] ; National Natural Science Foundation of China[52174364] ; National Natural Science Foundation of China[X210141TL210] ; Basic and Applied Basic Research Major Programme of Guangdong Province, China[2021B0301030003] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC027] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:001102315100001 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/177389 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | He, Lianlong; Chen, Chunlin; Qi, Zhixiang |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Ji Hua Lab, Foshan 528200, Peoples R China 4.Nanjing Univ Sci & Technol, Engn Res Ctr Mat Behav & Design, Natl Key Lab Adv Casting Technol, MIIT Key Lab Adv Met & Intermet Mat Technol,Minist, Nanjing 210094, Peoples R China |
| Recommended Citation GB/T 7714 | He, Neng,Cheng, Yongxin,Yuan, Tian,et al. Atomic-scale investigation of interface structures in polysynthetically twinned TiAl single crystals[J]. INTERMETALLICS,2024,164:8. |
| APA | He, Neng.,Cheng, Yongxin.,Yuan, Tian.,He, Lianlong.,Chen, Chunlin.,...&Ye, Hengqiang.(2024).Atomic-scale investigation of interface structures in polysynthetically twinned TiAl single crystals.INTERMETALLICS,164,8. |
| MLA | He, Neng,et al."Atomic-scale investigation of interface structures in polysynthetically twinned TiAl single crystals".INTERMETALLICS 164(2024):8. |
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