Jove
Visualize
联系我们

相关概念视频

Optimal Foraging00:48

Optimal Foraging

14.0K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
14.0K
Types of Non-structural Cracks in Concrete01:28

Types of Non-structural Cracks in Concrete

519
Non-structural cracks are primarily of three types: plastic, early-age thermal, and drying shrinkage cracks. Plastic cracks are further classified into plastic shrinkage cracks and plastic settlement cracks.
Plastic shrinkage cracks typically form within hours after the concrete is poured. The concrete's surface dries faster than the bottom, creating tensile stress that the still-plastic concrete cannot withstand, leading to diagonal or randomly patterned cracks on the concrete surface.
519
Layers of the Epidermis01:21

Layers of the Epidermis

8.8K
The epidermis, the outermost layer of the skin, is composed of several distinct layers. From deep to superficial, the layers of the epidermis are as follows:
Stratum Basale
Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
8.8K
Optimization Problems01:26

Optimization Problems

82
Optimization problems often involve identifying maximum or minimum values under specific constraints. A well-known example is determining the longest horizontal pipe that can be moved around a right-angled corner, where a 3-meter-wide hallway meets a 2-meter-wide hallway. This scenario, common in architectural design and industrial transport, can be understood conceptually through geometric and trigonometric reasoning.To visualize the problem, consider the pipe as a straight line that touches...
82
Design Example: Deciding Thickness of Lubricating Fluid in a Shaft01:23

Design Example: Deciding Thickness of Lubricating Fluid in a Shaft

348
Effective lubrication between a rotating shaft and its bearing housing is essential in rotating machinery to minimize friction, wear, and energy loss. With carefully controlled thickness and viscosity, the lubricant layer prevents metal-to-metal contact, ensuring smooth operation.
To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular velocity...
348
Thematic Layering in GIS01:30

Thematic Layering in GIS

361
In the past, planning projects such as schools or public facilities required extensive manual effort to gather and compile data. Information such as property boundaries, soil characteristics, road networks, zoning regulations, and flood zones had to be sourced individually from courthouses, utility providers, and registry offices. Assembling these datasets into a coherent format often took several months, delaying project timelines.The introduction of Geographic Information Systems (GIS)...
361

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Process and Mechanism of Nanocarrier-Loaded dsRNA Penetrating the Insect Cuticle: Theoretical Foundation for Transdermal Delivery.

Journal of agricultural and food chemistry·2026
Same author

Transcriptomics and Metabolomics Signatures of Fat Deposition Following Orchiectomy in Yak.

Animals : an open access journal from MDPI·2026
Same author

Martensitic Transformation and Strengthening Mechanism in a 304 Stainless Steel Subjected to Wire Drawing.

Materials (Basel, Switzerland)·2026
Same author

From Global to Local: A Multiscale Geographically Weighted Regression Analysis of Bovine Brucellosis Risk Factors.

Transboundary and emerging diseases·2026
Same author

Tumor Electric Field Therapy Inhibits Epithelial-Mesenchymal Transition, Invasion, and Migration of Glioblastoma by Targeting the c-FOS/CXCL14 Axis.

CNS neuroscience & therapeutics·2026
Same author

Whole-genome resequencing data of 200 domestic yaks from China.

Scientific data·2026
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关实验视频

Updated: Feb 14, 2026

Production of Single Tracks of Ti-6Al-4V by Directed Energy Deposition to Determine the Layer Thickness for Multilayer Deposition
09:12

Production of Single Tracks of Ti-6Al-4V by Directed Energy Deposition to Determine the Layer Thickness for Multilayer Deposition

Published on: March 13, 2018

9.7K

通过基板预热和层厚度优化,缓解LPBF加工的K418超合金中的固化裂变.

Deqin Zhao1, Jie Pei1, Chenxue Ma1

  • 1Key Laboratory for Light-Weight Materials, Nanjing Tech University, Nanjing 210009, China.

Materials (Basel, Switzerland)
|February 13, 2026
PubMed
概括
此摘要是机器生成的。

优化K418基超级合金的激光粉床融合 (LPBF) 需要特定的过程参数. 350°C的基板预热温度有效地减少了固化裂,以减少裂的组件制造.

关键词:
添加剂制造 添加剂制造 添加剂制造裂 裂 裂 裂 是一个激光粉床融合激光粉床融合这是一种基于的超级合金.

更多相关视频

Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal
10:39

Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal

Published on: January 15, 2016

13.0K
Antibody Staining in C. Elegans Using "Freeze-Cracking"
13:10

Antibody Staining in C. Elegans Using "Freeze-Cracking"

Published on: October 14, 2013

23.9K

相关实验视频

Last Updated: Feb 14, 2026

Production of Single Tracks of Ti-6Al-4V by Directed Energy Deposition to Determine the Layer Thickness for Multilayer Deposition
09:12

Production of Single Tracks of Ti-6Al-4V by Directed Energy Deposition to Determine the Layer Thickness for Multilayer Deposition

Published on: March 13, 2018

9.7K
Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal
10:39

Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal

Published on: January 15, 2016

13.0K
Antibody Staining in C. Elegans Using "Freeze-Cracking"
13:10

Antibody Staining in C. Elegans Using "Freeze-Cracking"

Published on: October 14, 2013

23.9K

科学领域:

  • 材料科学 材料科学 材料科学
  • 增材制造 增材制造 增材制造
  • 金工业是金工业的一个方面.

背景情况:

  • 固化裂变是基超级合金激光粉床融合 (LPBF) 的一个关键缺陷.
  • 基于的K418超级合金在增材制造过程中容易发生热裂.
  • 控制工艺参数对于实现高密度,无缺陷元件至关重要.

研究的目的:

  • 系统地调查层厚度和基板预热对K418合金LPBF固化裂纹的影响.
  • 确定最佳的工艺参数,以尽量减少热裂变.
  • 了解裂纹背后的微观结构机制.

主要方法:

  • 激光粉床融合 (LPBF) 用于制造K418基超合金样品.
  • 使用了不同的层厚度 (30微米和60微米) 和基板预热温度 (200°C和350°C).
  • 进行了微观分析 (例如,光学显微镜,SEM),以检查裂传播和微观结构特征.
  • 进行了相对密度测量.

主要成果:

  • 一层厚度为30微米,预加热350°C,体积能量密度 (VED) 为60-80J/mm3,有效抑制了裂纹,达到>99%的相对密度.
  • 预热到200°C提供了有限的裂纹抑制.
  • 在60μm层厚度时,预热变得有害,由于热积累和收缩应力增加了裂纹.
  • 沿高角粒边界传播的裂,与低点元素分离相关 (O,B,Si,C).

结论:

  • 350°C的基板预热是缓解K418合金LPBF固化裂变的关键参数.
  • 适度的VED与最佳预热和层厚相结合,可以生产高密度,最小化裂纹的K418元件.
  • 了解热应力和粒度边界分离的作用是控制LPBF超级合金中裂纹的关键.