Exceptional crystal strain hardening determined over macro- to micro- to nano-size scales in continuous spherical indentation tests

Armstrong Ronald W.; Elban Wayne L.

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Exceptional crystal strain hardening determined over macro- to micro- to nano-size scales in continuous spherical indentation tests

机译：在连续球形压痕试验中通过宏观至微达纳米尺寸的卓越晶体应变硬化

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Calculations of an order of magnitude greater strain hardening coefficient over compression or tensile test measurements are demonstrated for continuous indentation hardness measurements past "pop-in". Analyses were performed at small indentation strains for a macro-ball test on a NaCl crystal and at larger strains measured for rounded points of micro- and nano-tipped indenters in tests of MgO and copper crystal surfaces. The exceptional strain hardening is attributed to the smaller spacing and consequent interactions of the plastically-induced dislocations, including for MgO, the formation of nano-scale sessile dislocations accompanying the imposed three-dimensional deformation. The dislocation-based hardening is much greater than the smaller so-called "Indentation Size Effect (ISE)" of softening obtained at larger, constant strain, penetration depths with Berkovich-type indenters. Such ISE softening is attributed rather to the reverse effect of increasingly larger dislocation separations accompanying the greater plastic indentation depths.

机译：对压缩或拉伸试验测量的数量级阶数大的数量级的计算用于过去“POP-IN”的连续压痕硬度测量。在NaCl晶体上的宏观球试验的小压痕菌株中进行分析，并在MgO和铜晶体表面的测试中测量的微型和纳米尖头压痕的圆形菌株。卓越的应变硬化归因于塑性诱导的脱位的间距较小和随后的相互作用，包括MgO，伴随着施加的三维变形的纳米尺度无梗塞脱臼的形成。基于错位的硬化远大于在较大，恒定的菌株，伯克维奇型压头处获得的软化的较小所谓的“压痕尺寸效应（ISE）”。这种ise软化是归因于伴随着更大的塑料压痕深度的越来越大的位错分离的逆向效果。

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《Materials Science and Engineering》 |2019年第may29期|95-100|共6页
作者
Armstrong Ronald W.; Elban Wayne L.;
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作者单位

Univ Maryland Dept Mech Engn College Pk MD 20742 USA;

Loyola Univ Maryland Dept Engn Baltimore MD 21210 USA;

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原文格式 PDF
正文语种 eng
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关键词
Hardness; Micromechanics; Stress/strain calculations; Strain hardening; Plasticity; Dislocations;

机译：硬度;微机械;应变/应变计算;应变硬化;可塑性;脱臼;

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1. Exceptional crystal strain hardening determined over macro- to micro- to nano-size scales in continuous spherical indentation tests [J] . Armstrong Ronald W., Elban Wayne L. Materials Science and Engineering . 2019,第MAYa29期

机译：在连续球形压痕测试中，确定了从宏观到微米到纳米尺寸的异常晶体应变硬化
2. Dynamic spherical indentation of strain hardening materials with and without strain rate dependent deformation behavior [J] . Lee A., Komvopoulos K. Mechanics of materials . 2019,第JUNa期

机译：带有和不带有应变率相关变形行为的应变硬化材料的动态球形压痕
3. On the possibility to obtain the stress-strain curve for a strain-hardening material by spherical indentation [J] . M. Beghini, L. Bertini, V. Fontanari International Journal of Computer Applications in Technology . 2002,第4a5期

机译：关于通过球形压痕获得应变硬化材料的应力-应变曲线的可能性
4. Mechanical properties distributed in friction stir weld determined by spherical indentation testing [C] . N. Huber, J. Heerens, D. Rao, International symposium on friction stir welding . 2010

机译：通过球形压痕测试确定搅拌摩擦焊接中的力学性能
5. Flow Stress, Strain Hardening Rate, and Dislocation Avalanches: Size and Strain Rate Dependence in Nano- and Micro-Scaled Single Crystal Tungsten [D] . Jiang, Katherine. 2019

机译：流量应力，应变硬化率和位错雪崩：纳米和微鳞型单晶钨中的尺寸和应变率依赖性
6. Computed tomography porosity and spherical indentation for determining cortical bone millimetre-scale mechanical properties [O] . Oliver R. Boughton, Shaocheng Ma, Xiran Cai, -1

机译：计算机断层扫描孔隙率和球形压痕确定皮层毫米级力学性能
7. Decision-making is the process of analyzing information about a problem situation and comparing it to a specific conclusion in order to solve a specific problematic (Yıkılmaz, 2001; Miller and Byrnes, 2001). Decision-making styles are a mechanism that is influenced by the internal and external conditions that determine the direction of the decisions of the individual, the content of the decision-making process, and the outcome of the decision-making process (Payne, Bettman and Johson, 1993; Bavol’ár and Orosová, 2015). ACT is a contemporary member of the Cognitive Behavioral Therapy family. ACT (Acceptance and commitment therapy) has both similar and different directions with Behavioral Therapies and Cognitive Therapies (Herbet and Forman, 2011; Hayes, 2004). KKT responds to classical behavioral treatments using both existential and cognitive approaches in the analysis of behavior. KKT is a science wing that tries to solve human problems with a wider perspective aimed at solving problematic human behaviors (Plumb, Stewart, Dahl and Lundgren, 2009). It is seen that there is very little research about the new approach of ACT approach when the aiming country of our country is screened and it is thought that our country will contribute to the field of psychological counseling with the work done. In the scope of the research, experimental and control groups and preliminary test, post-test and follow-up measurements of 2x3 experimental design were used. The study's study group consists of a total of 24 (12 experimental and 12 control groups) university students studying in different departments and levels, continuing their education in the academic year of 2015-2016 in Ağrı province and İbrahim Chechen University in 2015-2016 academic year. The average age of participants in the experiment and control group is 20. There were 12 participants in the experimental group, 7 female and 5 male, and 12 participants, 7 female and 5 male in the control group. Personal Information Form and Decision Making Style Scale prepared by the researcher were used in the research. In order to decide on the tests to be used in the course of analyzing the data, the scores of the participant's Decision Styles Scale pre-test, which are placed primarily in the experimental and control groups, it was analyzed whether the basic expectations of parametric tests were answered. As a result of the analysis made, the scores, skewness and kurtosis coefficients obtained from the Decision Making Styles Scale were given to the experimental and control groups. It was determined that the distribution was normal in the result of Shapiro-Wilk test, in which the skewness and kurtosis coefficients of each sub-scale were ranked between -1 and +1. Participants in the experimental and control groups; homogeneity test results for decision-style pre-test measurements indicate that the data are homogeneous. According to the results of the Mauchly Globalness Test, it has been determined that working supports the hypothesis. It was determined that there was no significant difference between the pre-test scores obtained from dependent decision-making style of experiment and control groups, but the test group showed lower mean scores at the significant level within the scores of post-test and follow-up tests. Therefore, it can be said that the ACT-oriented psychoeducation program applied to the experimental group reduces the dependent decision-making style scores from the decision style sub-dimensions and the psychoeducation program has a lasting effect. It was determined that there was no significant difference between pre-test, post-test and follow-up scores obtained from the Spontaneous-Instant Decision Style of experiment and control groups. Thus, it can be said that this situation does not cause a significant difference in the Spontaneous-Decision-Making Style scores from the decision style sub-dimensions of the ACT-oriented psychoeducation program applied to the experimental group. The ACT -oriented psychoeducation program had a decline in the intuitive decision-making styles of the individuals, but this decrease did not create significant differences. Thus, it can be said that this situation does not make a meaningful difference in the intuitive decision style scores from the decision style sub-dimensions of the KKT oriented psychoeducation program applied to the experimental group. The pre-test scores obtained from the rational decision-making style of the experimental and control groups showed that there was a difference between the post-test and the follow-up scores, but this difference was not significant. As a result of the analysis, it was determined that the test group had higher levels of rational decision style than the pre - test scores in the post test and follow - up scores, whereas the post test and follow - up test scores in the control group rational decision style showed a decrease compared to the pre - test scores. the pre - test scores. Decision-making Styles Scale Avoidant Decision Making As a result of the analysis of the mean scores of the subscale scores of pre-test, post-test and follow-up measures, the group effect was found to be insignificant. It was determined that the experimental and control groups differed significantly from the pre-test scores obtained from the avoidant decision-making style but did not show any significant change within the scores of the post-test and follow-up tests. [O] . mustafa ercengiz, ali haydar şar 2018

机译：决策是分析有关问题情况的信息并将其与特定结论进行比较的过程，以解决特定的问题（Yıkılmaz，2001; Miller和Byrnes，2001）。决策风格是一种机制，受到内部和外部条件的影响，确定个人决定的方向，决策过程的内容以及决策过程的结果（PAYNE，BETTMAN和BEDNE） Johson，1993;Bavol'ár和奥萨洛瓦，2015）。法案是认知行为治疗家庭的当代成员。行为（验收和承诺治疗）具有与行为疗法和认知疗法的类似和不同方向（Herbet和Forman，2011; Hayes，2004）。 KKT在分析行为中使用存在性和认知方法来响应古典行为治疗方法。 KKT是一个科学翼，试图解决人类问题，旨在解决有问题的人类行为（铅垂，斯图尔特，Dahl和Lundgren，2009）。有人认为，当我们国家的瞄准国家进行筛选时，有关行动方法的新方法几乎没有研究，并且认为我们的国家将为完成工作做出贡献的心理咨询领域。在研究的范围内，使用实验和对照组和初步测试，使用后测试和后续测量的2x3实验设计。该研究的研究小组包括共24名（12个实验和12个对照组）大学学生在不同的部门和水平上学习，在2015-2016学术上继续进行2015-2016的学术年度2015-2016学年年。实验和对照组参与者的平均年龄是20.实验组中有12名参与者，7名女性和5名男性，12名参与者，7名女性和5名男性。研究人员准备的个人信息表格和决策制定风格规模在研究中使用。为了决定在分析数据的过程中使用的测试，参与者的决策风格刻度预测的分数主要在实验和对照组中进行，分析了参数的基本期望吗？测试得到了回答。由于对实验和对照组给出了从决策曲调标度获得的分数，偏移和峰度分子系数。确定该分布是正常的在成熟的-WILK试验结果中，其中每亚级的偏差和刚度系数在-1到+1之间排名。实验和对照组的参与者;决策式预测测量的同质性测试结果表明数据是均匀的。根据毛毛环保试验的结果，已确定工作支持假设。据确定，从依赖决策风格的实验和对照组获得的预测分数之间没有显着差异，但测试组在测试后的分数内显示出较低的平均分数和后续的分数 - 测试。因此，可以说，应用于实验组的面向活动的心理教育程序减少了决策风格子维度的依赖决策风格分数，并且心理教育程序具有持久的效果。据确定，从实验和对照组自发决策风格获得的预测试，测试后和后续评分之间没有显着差异。因此，可以说这种情况不会导致从应用于实验组的活动导向的心理教育程序的决策风格分数的自发决策风格分数显着差异。行为的心理教育计划在个人直观的决策风格下降，但这种减少并没有产生显着的差异。因此，可以说，这种情况不会在从应用于实验组的KKT导向的心理教育程序的决策风格分数中产生有意义的决策风格分数。从实验和对照组的理性决策风格获得的预测分数显示后检验后和随访评分之间存在差异，但这种差异并不重要。由于分析，确定测试组的理性决策风格较高，而不是后测试和后续分数的预测分数，而对照组合理决策风格的后测试和后续测试分数显示出与预测试分数相比的减少。预测分数。决策款式扩展避免决策由于分析了预测试，测试后和后续措施的班次评分的平均分数，发现群体效应是微不足道的。确定实验和对照组从避免决策风格获得的预测评分中显着不同，但在测试后和后续测试的分数内没有显示出任何重大变化。

Exceptional crystal strain hardening determined over macro- to micro- to nano-size scales in continuous spherical indentation tests

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