Laser Additive Manufacturing (LAM) enables economical production of complex lightweight structures as well patient individual implants. Due to these possibilities the additive manufacturing technology gains increasing importance in aircraft and medical industry. Yet industries obtain high quality standards demand predictability material properties for static dynamic load cases. However, especially fatigue crack propagation are not sufficiently determined. Therefore this paper presents an...

Today, laser additive manufacturing (LAM) is used in more and industrial applications. Due to a new freedom design it offers high potential for weight saving lightweight applications, e.g., the aerospace industry. However, most engineers are parts conventional methods, such as milling casting, often only have limited experience designing products manufacturing. The absence of comprehensive guidelines therefore limiting further usage distribution LAM. In this paper, experimental...

Additive manufacturing technologies are in the process of establishing themselves as an alternative production technology to conventional such casting or milling. Especially laser additive (LAM) enables metallic parts with mechanical properties comparable conventionally manufactured components. Due high geometrical freedom LAM ultra-light weight designs and therefore gains increasing importance aircraft space industry. The quality standards these industries demand predictability material for...

Selective Laser Melting (SLM) is an additive layer manufacturing technology that offers several advantages compared to conven- tional methods of production such as increased freedom design and a toolless suited for variable lot sizes. Despite these attractive aspects today's state the art SLM machines lack holistic process monitoring system detects records typical defects during production. A novel sensor concept based on low coherence interferometry (LCI) was integrated into setup. The...

Laser Powder Bed Fusion is today used for the serial production of parts, e.g. in medical and aerospace markets. One major limitations comparatively low build rate process, which leads to productivity high costs when compared conventional processes. Current approaches such as use multi-laser systems help increasing but come at higher investment costs. Overall, limits number business cases hinders market uptake more cost-sensitive industries. This paper suggests a combined approach subsequent...

In the laser powder bed fusion of metals (PBF-LB/M), process simulation is a key factor to optimization manufacturing with reasonable amounts resources. While focus research lies on development approaches solve problem length scales when comparing spot parts dimension, conscientious modeling material applied provides an opportunity increase accuracy computational studies no significant in required Within this study, model commonly used Ti–6Al–4V alloy for thermo-mechanical at macro- and...

The technology of laser beam melting (LBM) has lately become a true option for series production functional end products. Metallic materials such as steel, aluminum, and titanium alloys may be processed to fully dense parts with mechanical properties meeting or even exceeding their conventionally manufactured counterparts. However, the use LBM industrial applications also requires reliable quality assurance methods along entire process chain. Besides monitoring controlling itself, this...

Today, industrial usage of carbon fiber reinforced plastic (CFRP) is steadily increasing, with an amount 67 000 ton/yr [“Carbon fibers and plastics (CFRP)—A global market overview,” Report, Research Markets Ltd., Dublin, Ireland, 2013]. Products such as the Boeing 787 Airbus A350 in aerospace sector, well BMW i3 from automotive industry consist more than 50% CFRP their structural weight. At same time, these products also have comparatively high production volumes, e.g., >10 cars/yr...

Abstract Our world is constantly facing a wide variety of social challenges – currently, issues such as climate change, security, demographic and resource conservation are significant importance show an acute need for action. Disruptive technologies, among other things, needed to tackle problems. Additive manufacturing (AM) regarded the ‘game changer / paradigm shift’ technology digital, automated production future key enabler ‘Production 2.0’.

Biomimetics as well additive manufacturing have prominently produced novel design approaches for parts and products independently from each other. The combination of both has resulted in numerous innovative part designs that were unseen before. However remarkable the marketing impact individual 3D printed biomimetic been, a widespread industrial application is missing to date. This publication, therefore, takes closer look at how currently pursued evaluates different based on their...

This article presents investigations into the weldability of high-performance polymers and carbon fiber reinforced thermoplastics (CFRP) using laser transmission welding techniques. Fundamental studies absorption characteristics CFRP as joining partner heat distribution within surface due to impact have been performed. The process has analyzed with respect properties weld seam lap shear strength tests realized for different material combinations.

Additive manufacturing (AM) has been leveraged across various industries to potentially open design spaces allowing the of parts reduce weight, cost, and integrated design. Over past decade, AM sped up fast enough penetrate industry offering potential solutions for multiple materials, such as metals, alloys, plastics, polymers, etc. However, challenges lie best utilize opened current generation engineers are trained conventional process. With this lack guidelines process, users limiting...

Lattice structures in additive manufacturing of 316L stainless steel have gained increasing attention due to their well-suited mechanical properties and lightweight characteristics. Infill such as honeycomb, lattice, gyroid shown promise achieving desirable for various applications. However, the design process these is complex time-consuming. In this study, we propose a machine learning-based approach optimize infill fabricated using laser powder bed fusion (L-PBF) technology under different...

Lightweight materials are becoming increasingly important in construction because of the potential for savings resources and energy. The use cellular is a promising approach to reduce weight components further. In last decade, significant progress has been made production aluminium foams. However, lack techniques further processing these new so far prevented widespread industrial use. present paper reports results from laser welding foam, shows that process productive joining method this...

With increasing maturity of the laser powder bed fusion (PBF-LB/M) process, related products are becoming more complex. The conventional parts integrated into one design, requirements regarding local material properties arise. This concerns for instance with high demands temperature management. Here, different thermal conductivities within part enable control distribution as well direction heat flows. realization those poses a challenge, though, use multiple materials in PBF-LB/M is not...

Proton exchange membrane fuel cells (PEMFCs) represent today one of the most common types for mobility applications due to their comparatively high-power density, low operating temperature, and costs. A PEMFC regularly consists a stack individual in which each polar plates electrode assembly. To achieve best possible electric conductivity over series connection cells, contact pressure between must be uniformly distributed cell area. This is usually applied by end plates, frame are clamped...