Reply to 'comments on ‘the brittle-to-ductile transition—I: A cooperative dislocation generation instability; II: Dislocation dynamics and the strain rate dependence of the transition temperature’'

M. Khantha; V. Vitek

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Reply to 'comments on ‘the brittle-to-ductile transition—I: A cooperative dislocation generation instability; II: Dislocation dynamics and the strain rate dependence of the transition temperature’'

机译：答复“关于脆性-韧性转变的评论：I：位错协同产生的不稳定性; II：位错动力学和转变温度对应变率的依赖性”

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Recently, Hirsch and Roberts (HR) [1] have commented on the model for the brittle-to-ductile transition (BDT) and its strain-rate dependence which was proposed by Khantha, Pope and Vitck (KPV) [2] and IChantha (MK), [3] respectively. HR conclude that,{he KPV-MK model predicts either a strain-rate independent sharp transition or a strain-rate dependent gradual transition for the case of silicon. Previously, tlie sharp strain-rate dependent BDT in Si, was modeled by Hirsch et al. [4,5] using a 'Dynamic Simulation Model' (DSM) for interacting dislocations with homogeneous distribution of dislocation sources along the crack front. Hirsch et al. [4,5] also examined separately the effect of heterogeneous sources along the crack front. HR maintain that a strain-rate dependent sharp transition can be obtained only by using a heterogeneous source model and not using the KPV-MK and DSM models based on homogeneous sources. In this paper, we begin with a brief summary of the KPV-MK and DSM models, address then the specific issues raised hi HR and demonstrate that their conclusions regarding the KPV-MK model are not warranted.

机译：最近，Hirsch和Roberts（HR）[1]评论了由Khantha，Pope和Vitck（KPV）[2]和IChantha提出的脆性-延性转变（BDT）模型及其应变率依赖性。（MK），[3]。 HR得出结论，{对于硅，KPV-MK模型预测应变率独立的急剧转变或应变率相关的逐渐转变。以前，Hirsch等人模拟了硅中依赖于应变速率的尖锐的BDT。 [4,5]使用“动态模拟模型”（DSM）来使位错与沿裂纹前沿的位错源均匀分布的位错相互作用。 Hirsch等。 [4,5]还分别检查了沿裂纹前沿的非均质源的影响。 HR坚持认为，只能通过使用异构源模型而不是基于均质源的KPV-MK和DSM模型才能获得依赖于应变率的急剧转变。在本文中，我们首先简要介绍KPV-MK和DSM模型，然后解决人力资源部门提出的具体问题，并证明他们对KPV-MK模型的结论不正确。

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《Scripta materialia》 |1996年第2期|共5页
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M. Khantha; V. Vitek;
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中图分类金属学与热处理;
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1. Comment on the reply to "comments on the brittle-to-ductile transition—I: Cooperative dislocation generation instability; II: Dislocation dynamics and the strain-rate dependence of the transition temperature" [J] . P. B. Hirsch, S. G. Roberts Scripta materialia . 1996,第2期

机译：评论“对脆性至韧性转变的评论——I：合作位错产生的不稳定性; II：位错动力学和转变温度对应变率的依赖性”的评论
2. Reply to "comments on ‘the brittle-to-ductile transition—I: A cooperative dislocation generation instability; II: Dislocation dynamics and the strain rate dependence of the transition temperature’" [J] . M. Khantha, V. Vitek Scripta materialia . 1996,第2期

机译：答复“关于脆性-韧性转变的评论：I：位错协同产生的不稳定性; II：位错动力学和转变温度对应变率的依赖性”
3. COMMENT ON THE BRITTLE-TO-DUCTILE TRANSITION: A COOPERATIVE DISLOCATION GENERATION INSTABILITY; DISLOCATION DYNAMICS AND THE STRAIN-RATE DEPENDENCE OF THE TRANSITION TEMPERATURE [J] . P. B. HIRSCH, S. G. ROBERTS Acta Materialia . 1996,第6期

机译：关于从脆性到延性转变的评论：协作性错位产生的不稳定性；过渡温度的位错动力学和应变率依赖性
4. Temperature-dependent onset of yielding in dislocation-free silicon: evidence of a brittle-to-ductile transition [C] . R. H. Folk II, M. Khantha, D. P. Pope, Symposium on fracture and ductile vs. brittle Behavior -Theory, modelling and experiment . 1999

机译：不脱位硅中产生的温度依赖性发作：脆性到韧性过渡的证据
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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
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7. Strain-rate dependent mechanism of cooperative dislocation generation: application to the brittle–ductile transition [O] . M. Khantha, V. Vitek, D. P. Pope 2015

机译：合作位错产生的应变率依赖机制：应用于脆 - 韧性转变
8. New Model for the Brittle-to-Ductile Transition Based on a Collective Dislocation Generation Instability: Theory and Experiment [R] . Vitek, V. , Pope, D. P. , Khantha, M. 1998

机译：基于集体位错生成不稳定的脆 - 韧性转换新模型：理论与实验

Reply to 'comments on ‘the brittle-to-ductile transition—I: A cooperative dislocation generation instability; II: Dislocation dynamics and the strain rate dependence of the transition temperature’'

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