Mechanical Properties & Deformation of Materials eJournal最新文献

Genesis of Plasticity-Induced Serrated Metal Flow in Medium-Mn Steel 中锰钢中塑性诱导的锯齿状金属流动的成因

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2022-06-01 DOI: 10.2139/ssrn.3742930

N. Bhowmik, Saroj Kumar Ghosh, S. Mandal, A. Haldar, P. Chattopadhyay

引用次数: 4

Tuning Mechanical Properties of High Entropy Alloys by Electro-Pulsing Method 电脉冲法调谐高熵合金力学性能

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2022-01-01 DOI: 10.2139/ssrn.3932309

N. Wang, R. K. Nutor, Y.X. Li, Q. Cao, S. Ding, X.D. Wang, D.X. Zhang, J. Jiang

{"title":"Tuning Mechanical Properties of High Entropy Alloys by Electro-Pulsing Method","authors":"N. Wang, R. K. Nutor, Y.X. Li, Q. Cao, S. Ding, X.D. Wang, D.X. Zhang, J. Jiang","doi":"10.2139/ssrn.3932309","DOIUrl":"https://doi.org/10.2139/ssrn.3932309","url":null,"abstract":"The single-phase face-centered cubic (FCC) high entropy alloys (HEAs) with remarkable ductility but lower strength, limiting the engineering application in a wide range. The ductility-strength trade-off could be addressed by tuning the constituent and chemical composition to lower stacking fault energy (SFE) and introduce additional strain-hardening strategies. In this work, a series of non-equiatomic (Co 40 Fe 25 Cr 20 Ni 15 ) 95 Al 5 HEAs annealed by flash electro-pulsing treatments at different voltages, was prepared with the incorporation of deformation twining during plastic deformation. The 130 V-annealed sample demonstrated a good combination of tensile strength of 0.96 GPa and ductility of 16.5%, while the 150 V-annealed alloy showed dramatically increased ductility of 49.2%. The higher Hall-Petch coefficient k H ( K σy ) value of 341.6 (828.8) and the thinner deformation twins spacing was responsible for the improved tensile strength for 130 V-samples. Moreover, more stacking faults and deformation twins in 150 V-sample accommodated more plastic and delayed the fracture, resulting increased ductility. This work provides a fast-effective method to tune the mechanical properties of non-equiatomic HEAs by adjusting the annealing voltage and achieved in a minute, which might open the avenue for future industrial application.","PeriodicalId":180833,"journal":{"name":"Mechanical Properties & Deformation of Materials eJournal","volume":"509 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134289067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Compression Fatigue Properties and Damage Mechanisms of a Bioinspired Nacre-Like Ceramic-Polymer Composite 仿生类珍珠陶瓷-聚合物复合材料的压缩疲劳性能及损伤机理

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2021-10-01 DOI: 10.2139/ssrn.3860384

Guoqi Tan, Qin Yu, Zengqian Liu, Xuegang Wang, Mingyang Zhang, Yanyan Liu, Zhefeng Zhang, R. Ritchie

引用次数: 16

Grain Size Altering Yielding Mechanisms in Ultrafine Grained High-Mn Austenitic Steel: Advanced TEM Investigations 超细晶高锰奥氏体钢晶粒尺寸改变屈服机制:先进的透射电镜研究

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2021-09-30 DOI: 10.2139/ssrn.3681163

Chang-Yu Hung, Y. Bai, N. Tsuji, M. Murayama

{"title":"Grain Size Altering Yielding Mechanisms in Ultrafine Grained High-Mn Austenitic Steel: Advanced TEM Investigations","authors":"Chang-Yu Hung, Y. Bai, N. Tsuji, M. Murayama","doi":"10.2139/ssrn.3681163","DOIUrl":"https://doi.org/10.2139/ssrn.3681163","url":null,"abstract":"Abstract The underlying mechanism of discontinuous yielding behavior in an ultrafine-grained (UFG) Fe-31Mn-3Al-3Si (wt.%) austenitic TWIP steel was investigated by the use of advanced TEM technique with taking the plastic deformation mechanisms and their correlation with grains size near the macroscopic yield point into account. Typical yield drop mechanisms such as the dislocation locking by the Cottrell atmosphere due to the presence of interstitial impurities cannot explain the origin of this phenomenon in the UFG high-Mn austenitic TWIP steel. Here, we experimentally revealed that the plastic deformation mechanisms in the early stage of deformation, around the macroscopic yield point, show an obvious association with grain size. More specifically, the main mechanism shifts from the conventional slip in grain interior to twinning nucleated from grain boundaries with decreasing the grain size down to less than 1 μm. Our observation indicates that the grain size dependent deformation mechanisms transition is also deeply associated with the discontinuous yielding behavior as it could govern the changes in the grain interior dislocation density of mobile dislocations around the macroscopic yield point.","PeriodicalId":180833,"journal":{"name":"Mechanical Properties & Deformation of Materials eJournal","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114138285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 25

Microstructure and Deformation Behaviour of Austenitic Low-Density Steels: The Defining Role of B2 Intermetallic Phase 奥氏体低密度钢的组织和变形行为:B2金属间相的决定性作用

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2021-08-24 DOI: 10.2139/ssrn.3831019

B. Mishra, R. Sarkar, Vajinder Singh, A. Mukhopadhyay, Rohit T. Mathew, V. Madhu, M. Prasad

{"title":"Microstructure and Deformation Behaviour of Austenitic Low-Density Steels: The Defining Role of B2 Intermetallic Phase","authors":"B. Mishra, R. Sarkar, Vajinder Singh, A. Mukhopadhyay, Rohit T. Mathew, V. Madhu, M. Prasad","doi":"10.2139/ssrn.3831019","DOIUrl":"https://doi.org/10.2139/ssrn.3831019","url":null,"abstract":"Abstract The feasibility of significant weight reduction in conjunction with the superior strength-ductility combination makes Fe-Mn-Al-C-based steels the candidate material for automotive and structural applications. The alloy chemistry and processing conditions influence the microstructure in low-density steels (LDS); however, their role in deformation behaviour is not fully understood. In the present study, three different austenitic LDS grades viz. Fe-28Mn-9Al-0.9C, Fe-28Mn-9Al-5Ni-0.9C and Fe-15Mn-9Al-5Ni-0.9C alloys in hot-rolled conditions were used for evaluating the role of secondary phases, especially B2 ordered Fe(Ni)Al phase on deformation characteristics. Ni-free LDS microstructure consisted of the γ-matrix with fine κ-carbides, whereas Ni containing low Mn alloy possessed coarser κ-carbides along with B2 in both bamboo-like stringer and polygonal particle morphology in the γ-matrix. The B2 containing alloy exhibited higher strength with reduced tensile ductility than the B2-free alloy. Hardness of the γ-matrix and B2 phase were similar with B2 grains exhibiting distinct pop-in events in the nanoindentation curves indicating incipient plasticity. The γ-matrix and B2 co-deform near yield, and a favourable orientation relationship (OR) between the γ-matrix and B2 facilitated easy slip transfer, while the non-favourable OR controlled ductility by strain accumulation and B2-cracking. The differences in the strain hardening behaviour of B2-free and B2 containing alloys were elucidated based on the changes in dislocation substructure evolution examined by an automated crystal orientation mapping in electron microscopy.","PeriodicalId":180833,"journal":{"name":"Mechanical Properties & Deformation of Materials eJournal","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122398483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Enthalpy of Collagen Interfibrillar Bonds in Fetal Membranes 胎膜中胶原纤维间键的焓

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2021-07-10 DOI: 10.2139/ssrn.3592060

Y. Marom, S. Gengrinovitch, E. Shalev, D. Shilo

引用次数: 1

Cold Dwell Behaviour of Ti6Al Alloy: Understanding Load Shedding Using Digital Image Correlation and Crystal Plasticity Simulations Ti6Al合金的冷居住行为:利用数字图像相关和晶体塑性模拟来理解负载脱落

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2021-06-23 DOI: 10.2139/ssrn.3862135

Y. Xiong, N. Grilli, Phani S. Karamched, B. Li, E. Tarleton, A. Wilkinson

{"title":"Cold Dwell Behaviour of Ti6Al Alloy: Understanding Load Shedding Using Digital Image Correlation and Crystal Plasticity Simulations","authors":"Y. Xiong, N. Grilli, Phani S. Karamched, B. Li, E. Tarleton, A. Wilkinson","doi":"10.2139/ssrn.3862135","DOIUrl":"https://doi.org/10.2139/ssrn.3862135","url":null,"abstract":"Digital image correlation (DIC) and crystal plasticity simulation were utilised to study cold dwell behaviour in a coarse grain Ti-6Al alloy at 3 different temperatures up to 230 °C. Strains extracted from large volume grains were measured during creep by DIC and were used to calibrate the crystal plasticity model. The values of critical resolved shear stresses (CRSS) of the two main slip systems (basal and prismatic) were determined as a function of temperature. Stress along paths across the boundaries of two grain pairs, (1) a `rogue' grain pair and (2) a `non-rogue' grain pair, were determined at different temperatures. Load shedding was observed in the `rogue' grain pair, where a stress increment during the creep period was found in the `hard' grain. At elevated temperatures, 120 °C was found to be the worst case scenario as the stress difference at the grain boundaries of these two grain pairs were found to be the largest among the three temperatures. This can be attributed to the fact that the strain rate sensitivity of both prismatic and basal slip systems is at its greatest in this worst case scenario temperature.","PeriodicalId":180833,"journal":{"name":"Mechanical Properties & Deformation of Materials eJournal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128977863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Learning from Superelasticity Data to Search for Ti-Ni Alloys with Large Elastocaloric Effect 从超弹性数据中学习寻找具有大弹热效应的Ti-Ni合金

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2021-05-12 DOI: 10.2139/ssrn.3844696

Lei Ding, Yumei Zhou, Yangyang Xu, Pengfei Dang, Xiangdong Ding, Jun Sun, T. Lookman, D. Xue

引用次数: 17

Mechanical Properties of Gradient Copper Nano-Gyroid Cellular Structures: A Molecular Dynamics Study 梯度铜纳米陀螺细胞结构的力学性能:分子动力学研究

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2021-04-07 DOI: 10.2139/ssrn.3538809

Rui Dai, Dawei Li, Yunlong Tang

引用次数: 1

Twin-Boundary Assisted Crack Tip Plasticity and Toughening in Lamellar γ-TiAl 片层γ-TiAl双界辅助裂纹尖端塑性与增韧

Mechanical Properties & Deformation of Materials eJournal Pub Date : 2021-02-21 DOI: 10.2139/ssrn.3790079

A. Neogi, R. Janisch

{"title":"Twin-Boundary Assisted Crack Tip Plasticity and Toughening in Lamellar γ-TiAl","authors":"A. Neogi, R. Janisch","doi":"10.2139/ssrn.3790079","DOIUrl":"https://doi.org/10.2139/ssrn.3790079","url":null,"abstract":"The internal twin-boundaries in lamellar γ-TiAl alloys, namely true-twin (TT), rotational boundary(RB), and pseudo-twin (PT), are known to be effective in strengthening the TiAl microstructures. Nevertheless, for designing microstructures with optimised mechanical properties, a better understanding of the role of these boundaries on fracture behavior is still required. To this end, we study how and to what degree crack advancement is affected by the local lattice orientation and atomic structure at the various twin boundaries. Molecular statics simulations were performed in conjunction with a linear elastic fracture mechanics based analysis, to understand the inter-lamellar and as well as trans-lamellar crack advancement at a TT, RB, and PT interface. The fracture toughness as well as the crack advancement mechanisms of the inter-lamellar cracks depend critically on the propagation direction. For instance, cracks along ⟨11‾2] in the TT, RB, and PT plane always emit dislocations at the crack tip, while the cracks along the opposite direction are brittle in nature. When it comes to trans-lamellar crack advancement, the crack tip shows significant plastic deformation and toughening for all inter-faces. However, at a TT, a brittle crack is able to penetrate through the interface at a higher applied load, and propagates in the adjacent γ′ phase, while in the case of RB and PT, the crack tip is blunted and arrested at or near the boundary, resulting in dislocation emission and crack tip toughening. This suggests that a variation of the sequence of the different rotational boundaries could be a possibility to tune the crack tip plasticity and toughening in lamellar TiAl.","PeriodicalId":180833,"journal":{"name":"Mechanical Properties & Deformation of Materials eJournal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124568591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23