Temperature history influence on laser beam absorption at laser material processing
激光材料加工过程中温度历史对激光束吸收的影响
基本信息
- 批准号:274609062
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2015
- 资助国家:德国
- 起止时间:2014-12-31 至 2018-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The knowledge of the ratio of thermal energy coupled into the material during laser-matter-interaction is an important factor for planning of laser based or laser assisted material processing. The main goal of the proposed research project is the coupling of (defocused) laser beam energy at dynamic processing of selected steels being relevant to industrial applications with the particular regard to temperature history and thereby related surface modification. For this purpose laser irradiation experiments are to be carried out regarding varying temperature cycles while transient recording of spectral reflectivity in simultaneity with temperature. Each specimens surface condition is to be characterized prior to and after the processing. Based on reflectivity and surface condition results a phenomenological model on absorption behavior depending on temperature history is to be constructed. The absorption behavior has to be investigated under shielding gas atmosphere as well as in normal air conditions. This way it is possible to take effects of oxidation into account. Additionally, influences of surface treatment (i.e. polishing, milling, no treatment) on the dynamics of energy coupling are to be investigated. The desired results are supposed to be a basis for more accurate absorption functions for numerical simulations, which do depend on initial surface condition and temperature history instead of the standard approach of an absorption coefficient being a process detached value. There is a large area of applications for such an absorption model, for instance thermal forming, distortion compensation in processes and process chains, laser assisted mechanical forming and punching, heat conduction welding, hardening and many more.
了解激光-物质相互作用过程中耦合到材料中的热能比例是规划基于激光或激光辅助材料加工的重要因素。拟议研究项目的主要目标是在与工业应用相关的选定钢的动态加工中的(散焦)激光能量的耦合,特别是关于温度历史和相关的表面改性。为此,应进行激光辐照实验,以改变温度周期,同时与温度同时瞬时记录光谱反射率。每个样品的表面状况都要在加工之前和之后进行表征。基于反射率和表面条件的结果,建立了吸收行为依赖于温度历史的唯象模型。必须在保护气体气氛下和在正常空气条件下研究其吸收行为。这样就有可能考虑到氧化的影响。此外,还研究了表面处理(即抛光、研磨、不处理)对能量耦合动力学的影响。所需的结果被认为是数值模拟中更精确的吸收函数的基础,数值模拟确实取决于初始表面条件和温度历史,而不是标准的吸收系数是过程分离值。这种吸收模型有很大的应用领域,例如热成形、工艺和过程链中的变形补偿、激光辅助机械成形和冲压、热传导焊接、硬化等等。
项目成果
期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Effects of Short-Term Laser Beam Heating on the Absorptivity of Steel Sheets
短时激光束加热对钢板吸收率的影响
- DOI:10.3390/jmmp3020041
- 发表时间:2019
- 期刊:
- 影响因子:3.2
- 作者:Kügler
- 通讯作者:Kügler
Determining Absorptivity Variations of Multiple Laser Beam Treatments of Stainless Steel Sheets
- DOI:10.3390/jmmp2040084
- 发表时间:2018-12-01
- 期刊:
- 影响因子:3.2
- 作者:Kuegler, Helge;Vollertsen, Frank
- 通讯作者:Vollertsen, Frank
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Professor Dr.-Ing. Frank Vollertsen其他文献
Professor Dr.-Ing. Frank Vollertsen的其他文献
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{{ truncateString('Professor Dr.-Ing. Frank Vollertsen', 18)}}的其他基金
Water as lubricant for high-speed forming by means of LIPSS
水作为润滑剂,通过 LIPSS 进行高速成型
- 批准号:
416530419 - 财政年份:2019
- 资助金额:
-- - 项目类别:
Research Grants
Thermal drift in laser cutting of metallic mesh structures
金属网状结构激光切割中的热漂移
- 批准号:
424264718 - 财政年份:2019
- 资助金额:
-- - 项目类别:
Research Grants
Increase in process efficiency of laser chemical machining by preventing the gas bubble related removal disturbances
通过防止与气泡相关的去除干扰来提高激光化学加工的工艺效率
- 批准号:
403820352 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Research Grants
Influence of metal vapor on plasma arc stability
金属蒸气对等离子弧稳定性的影响
- 批准号:
387755874 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Research Grants
HighPa-Shock - Increasing reproducibility of the spring-back angle of thin metal sheets by inducing residual compressive stress with laser shock
HighPa-Shock - 通过激光冲击诱导残余压应力,提高薄金属板回弹角的可重复性
- 批准号:
399930874 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Research Grants
Influence of alloying elements on process dynamics during laser deep penetration welding
合金元素对激光深熔焊过程动力学的影响
- 批准号:
331107213 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Research Grants
Laser Finishing of the Multi-Scale Surface Structure of Additive Manufactured Parts
增材制造零件多尺度表面结构的激光精加工
- 批准号:
386371584 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Research Grants
Polished diamond coatings for dry tapering of aluminum
用于铝干式锥削的抛光金刚石涂层
- 批准号:
390771352 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Priority Programmes
Stabilization of the interface temperature in laser beam brazing of aluminum alloys with aluminum-based brazing alloys
铝合金与铝基钎料的激光束钎焊中界面温度的稳定
- 批准号:
376511346 - 财政年份:2017
- 资助金额:
-- - 项目类别:
Research Grants
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