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2024年9月1日 · An atomistic model of Cu-Ag core–shell nanowire using molecular dynamics is proposed. The simulation model was utilized for the evolution of temperature dependent (in the range of 10–500 K) tensile behavior and the identification of ductile-to-brittle transition temperature (DBTT) of single-crystal Cu-Ag core–shell nanowire.

2025年2月15日 · To enhance low-temperature toughness and reduce the DBTT of tungsten, alloying is a key approach, with elements such as yttrium (Y), potassium (K), and rhenium (Re) being particularly effective. For instance, the WYZ05 alloy exhibits higher high-temperature hardness and a lower DBTT compared to pure tungsten [21].

2022年10月26日 · The results show that with the increase of aging time, the DBTT of the impact curve first decreases and then increases, and the DBTT of impact curve is the lowest at 48 h. Combined with the in situ aging morphology of second-phase particles, precipitation, fusion, and coarsening of Ag3Sn particles are the reason for the change in DBTT.

What is ductile/brittle transition temperature (DBTT)? It is the transition temperature below which a ductile plastic specimen becomes brittle. This is not a specific temperature. It is rather a temperature spreading over the 10°C range. DBTT is expressed in °C. In the stress-strain curve, brittle materials follow a straight path.

韧性-脆性转变(dbt)，是体心立方(bcc)金属中普遍存在的特征。在临界温度以下，即韧脆转变温度(dbtt)， bcc金属的塑性表现为从韧性变形到解理 脆性断裂 的突变，从而限制了这些金属的使用温度窗口。因此，深入了解bcc金属中dbt的控制机理，对其更广泛的应用至 ...

2024年9月1日 · In this article, we prepare corncob-like Cu–Ag and core–shell Cu@Ag bimetallic structures by controlling the concentration of Ag and Cu salts via a galvanic replacement reaction. Moreover, the stru...

It is necessary to determine DBTT to avoid brittle and catastrophic failure. This article determined the ductile-to-brittle transition of various PLA-based biocomposite. A comprehensive database was developed to determine the DBTT of PLA, PLA-20KF, PLA-20KF-5Clay, and PLA-5Clay.

2011年4月9日 · The ductile-to-brittle transition temperature (DBTT) of a free-standing Pt-aluminide (PtAl) bondcoat was determined using the microtensile testing method and the effect of strain rate variation, in the range 10 −5 to 10 −1 s −1, on the DBTT studied. The DBTT increased appreciably with the increase in strain rate.

金属的延脆转移温度（DBTT），又称“无延性温度”（NDT）或称“ 脆性转变温度 ”，是当金属温度下降至某一点时，其性质延性转变成脆性时的温度。 通常此温度确定需通过冲击破裂试验，但测量设定上没有一套明确的标准。 测验时当到达某一点，可承受的耐破裂能量将会低于假设的某一值（通常钢铁传统上设定是40J），即延脆转移温度。 延脆转移温度相当重要，因为一旦金属材料低于延脆转移温度时，若遭受到很大的冲击，将会倾向产生巨大碎裂，而不会弯曲或变形。 举 …