压痕取向对MAX相ti2alc塑性变形开始的影响

IF 0.5 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Journal of The Japan Institute of Metals Pub Date : 2018-01-01 DOI:10.2320/JINSTMET.J2017042
Wada Yusuke, Sekido Nobuaki, Ohmura Takahito, Yoshimi Kyosuke
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引用次数: 1

摘要

采用火花等离子烧结法制备了高纯度元素材料Ti2AlC多晶合金,并在1500℃下退火24 h,研究了表面法向平行于< 3362 >、< 4481 >、< 0001 >和< 1120 >晶粒的纳米压痕行为。在纳米压痕加载过程中,所有压痕方向都发生了弹出事件。平行于< 1120 >和< 0001 >的压痕方向上观察到的首次弹出临界载荷高于< 3362 >和< 4481 >。残余压痕周围的表面形貌表明,压痕后的塑性变形主要是基底滑移。这些结果表明,基底位错的形核是压头下方塑性变形发生的主要障碍。(doi: 10.2320 / jinstmet.J2017042)
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Effect of Indentation Orientation on the Onset of Plastic Deformation for a MAX Phase Ti 2 AlC
Polycrystalline Ti2AlC alloys were prepared by spark plasma sintering of high purity elemental materials, and subsequently annealed at 1500°C for 24 h. Nanoindentation behavior was studied on the grains with their surface normal directions parallel to 〈3362〉, 〈4481〉, 〈0001〉 and 〈1120〉. During loading of nanoindentation, pop–in events were found to occur for all the indentation directions. The critical loads of the first pop–in observed for the indentation directions parallel to 〈1120〉 and 〈0001〉 were higher than those for 〈3362〉 and 〈4481〉. Surface topography around the residual indents suggests that the basal slip dominates the plastic deformation upon indentation. These results suggest that the nucleation of the basal dislocation is a major barrier for the onset of plastic deformation underneath the indenter. [doi:10.2320/jinstmet.J2017042]
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来源期刊
Journal of The Japan Institute of Metals
Journal of The Japan Institute of Metals 工程技术-冶金工程
CiteScore
0.70
自引率
0.00%
发文量
27
审稿时长
6-12 weeks
期刊介绍: Information not localized
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