Lightweight in Automotive Components by Forming Technology

Lightweight design is one of the current key drivers to reduce the energy consumption of vehicles.Design methodologies for lightweight components,strategies utilizing materials with favorable specific properties and hybrid materials are used to increase the performance of parts for automotive applications.In this paper,various forming processes to produce light parts are described.Material lightweight design is discussed,covering the manufacturing processes to produce hybrid components like fiber-metal,polymer-metal and metal-metal composites,which can be used in subsequent deep drawing or combined forming processes.Approaches to increasing the specific strength and stiffness with thermomechanical forming processes as well as the in situ control of the microstructure of such components are presented.Structure lightweight design discusses possibilities to plastically form high-strength or high-performance materials like magnesium or titanium in sheet,profile and tube forming operations.To join those materials and/or dissimilar materials,new joining by forming technologies are shown.To economically produce lightweight parts with gears or functional elements,incremental sheet-bulk metal forming is pre-sented.As an important part property,the damage evolution during the forming operations will be discussed to enable even lighter parts through a more reliable design.New methods for predicting and tailoring the mechanical properties like strength and residual stresses will be shown.The possibilities of system lightweight design with forming technologies are presented.A combination of additive manufacturing and forming to produce highly complex parts with integrated functions will be shown.The integration of functions by a hot extrusion process for the manufacturing of shape memory alloys is presented.An in-depth understanding of the newly developed processes,methodologies and effects allows for a more accurate dimen-sioning of components.This facilitates a reduction in the total mass and an increasing performance of vehicle components.

Analysis on Pore-Forming Pouring Pile Construction Technology of House Building Project

Compared with the in-place pile, the pore-forming pouring pile is more simple and convenient, with a wider range of construction. In the actual construction process, it is able to pass through complex bottom layer and water layer underground without very high requirements in equipment. The actual bearing capacity of single pile is very strong, so that it can be better to adapt to the actual needs of different scales or the different geological conditions in building. And it has been promoted and used greatly in building construction work [1]. This paper introduces the concept of the pore-forming pouring pile technology, analyzes the pore-forming construction technology and the pile construction technology, then talks about prevention problems of the pore-forming pouring pile construction in House Building Project, at last draws a conclusion that the pore-forming pouring pile technology is the most basic construction technology and is the most effective and convenient way of construction.

Preparation of New Type Ni-P Micro/Nano Metal Material Based on Bacteria Shape

A new type of Ni-P alloy with rod-shape was prepared by electroless deposition method based on the shape of Nocadia, a kind of bacteria. The material was characterized by microbiological method, scanning electron microscope, energy dispersion spectroscopy, transmission electron microscopy, fourier transform infrared spectroscopy, X-ray diffraction and vibrant sample magnetometer. It was found that Ni-P alloy deposited on Nocadia surface was amorphous when pH=8.0. The amount of Ni crystalline increased with pH of plating solution. Ni-P nano-particles deposited on active locations on the surface at the initial stage, and then homogeneous Ni-P film formed with time. Nocadia remained their original rod shape after Ni-P nano-particles deposition. The new type metal material formed of Ni-P alloy with nano-particles was prepared. The mag- netization of the material prepared at pH=9.7 is greater than that prepared at pH=8.0. The magnetic loss of the material prepared at pH=9.7 is less than 0.1. The dielectric loss exceeds 0.3 when frequency is higher than 14 GHz, which is 1.5 at 18 GHz. The new type Ni-P metal material with Nocadia shape has dielectric loss property.

Effects of Processing Technologies on Mechanical Properties of SiC Particulate Reinforced Magnesium Matrix Composites

Mg matrix composites with SiC particles ranging from 5vol%-25vol% were prepared using stirring casting method. Die casting, squeezing casting, and extrusion were applied for inhibiting or eliminating the defects such as gas porosity and shrinkage void. Through die casting and squeezing casting, most of the defects in Mg matrix composites could be eliminated, but the mechanical properties were improved limitedly. On the other hand, after hot extrusion, not only most of the defects of as-cast composites ingots were eliminated, but also the mechanical properties were improved markedly. With the addition of SiC, the tensile strength, yield strength and elastic modulus of as extrusion SiCp/AZ61 composites increased remarkably, and the elongation decreased obviously.

Highlight yield forming and innovative technologies in tropical crops

This special issue on tropical crops focuses on how these crops adapt to their tropical environment and accumulate carbohydrates in unique ways as well as recent technological innovations in genetics and breeding.The tropics have an abundance of natural resources such as light,heat,water and great diversity of higher plants.It is estimated that about 100000 plant species originated in tropical and subtropical zones around the globe.Also,many