Ductile-Brittle Transition Temperature (DBTT) The temperature above which a material shows ductility and below which shows brittleness is the Ductile–Brittle Transition Temperature (DBTT). This temperature is not exact but depends on factors such as heat treatment during manufacturing and impurity elements.

2021年2月1日 · The DBTT is deduced based on miniaturized three-point bending tests to provide reference data for the assessment of the irradiation effects on the tungsten alloys. This miniaturized geometry is designed to minimize the operational cost of neutron irradiation, to speed up post-irradiation examination, and to reduce the amount of nuclear waste.

2023年12月15日 · With increasing grain size from 91 μm to 255 μm, the ductile to brittle transition temperature (DBTT) increases by approximately 80 °C, accompanied by a corresponding 0.196 eV increase in DBT activation energy. An evident linear reciprocal relationship exists between DBTT and grain boundary ratio.

The ductile-brittle transition temperature (DBTT) is the temperature at which the fracture energy passes below a predetermined value (e.g., 40 J for a standard Charpy impact test).

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。

The ductile-to-brittle transition temperature (DBTT) increases while the room-temperature tensile properties (yield and tensile strengths, elongation at fracture) are essentially unchanged, unless concomitant microstructural evolution brought about by the aging treatment, such as softening or precipitation-hardening, takes place.

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关重要。 材料的脆性/韧性 (即抗裂纹扩展)，取决于裂纹尖端附近的位错活动。 裂纹尖端塑性是减缓或阻止裂纹前进的过程，包括两个不同的过程：位错在 裂纹尖端 或附近的形核和它们从裂纹滑动。 因 …

2023年6月6日 · The brittleness transfer temperature (DBTT) of modified tungsten materials can be evaluated by several test methods, such as tensile test, bending test, Charpy impact test and fracture toughness test. DBTT depends largely on the test method, strain rate and sample shape. Among them, researchers evaluated DBTT using Charpy impact and tensile tests.

韧脆转变温度是指在材料受力下，从韧性向脆性的转化所需的温度。 这个温度通常被称为“DBTT”（Ductile-Brittle Transition Temperature）。 在高于DBTT的温度下，材来自百度文库表现出良好的韧性，可以承受较大的变形量而不会断裂；而在低于DBTT的温度下，材料则变得脆性，容易发生断裂。 因此，DBTT是一个非常重要的参数，对于工程设计和材料选择都有着重要意义。 韧脆转变温度与材料本身的化学成分、微观结构、加工工艺等因素密切相关。 一般来说， …

2021年5月6日 · At specific temperatures for certain materials, the mechanical properties can change significantly. This phenomenon is known as the ductile to brittle transition temperature. This article will explain this mechanism and how it differs for various materials. Fracture types can be classified as either being ductile or brittle.