Find a detailed explanation of metal grain structure analysis – including how to prepare samples for microscopic analysis and understand the structural properties of metals – with expertise and insight from Struers, the world’s leading materialographic and metallographic experts.

2015年5月11日 · Cartridge brass, Cu – 30% Zn, has been used for many years to produce cartridge cases for ammunition due to its superior cold forming characteristics. This article shows the microstructure and hardness of cartridge brass from the fully annealed to the heavily cold worked condition.

Figure C shows the twinned austenitic grain structure of cartridge brass that was etched producing grains with different contrast in black and white. Note that unlike the flat etched L605 specimen, all of the grains are revealed.

2025年1月16日 · Brass plays a crucial role in metalworking and manufacturing, particularly in the production of small non-ferromagnetic and non-sparking components like hinges and signage parts. High-quality continuous cast billets and indirect extrusion methods ensure that brass components have a fine grain structure and excellent properties.

Each grain is a distinct crystal with its own orientation. The areas between the grains are known as grain boundaries. Within each grain, the individual atoms form a crystalline lattice. Each atom will have a certain number of close neighbors with which it shares loose bonds.

2020年3月2日 · Brass is a binary alloy composed of copper and zinc that has been produced for millennia and is valued for its workability, hardness, corrosion resistance, and attractive appearance. The exact properties of different brasses depend on the composition of the brass alloy, particularly the copper-zinc ratio.

samples with pre-annealed at 500oC structure have been performed successfully. However, according to analysis of crystal grain size change, brass triple treatment with ECAP does not make it possible to receive ultra-fine grain structure as received grain size is 2.3 µm, which is by an order greater.

Grain structure of the neck and shoulder of the cases remains constant for at least the same ten reloading cycles. The accuracy of induction annealing is not affected by case cleanliness. The composition of the brass alloy is not contaminated by annealing if powder and primer residue is not removed from the cases first.

In this study, we designed a novel heterogeneously optimized TMC for the first time, which features fine grain/coarse grain (FG/CG) regions embedding in-situ interfacial...

1. What is the composition(s) of ALPHA-brass? Look up the appropriate phase diagram in the text. What is the crystal structure of ALPHA-brass? What other metals share this structure? 2. Which properties of metals are improved through cold working? Which are not? Explain. 3. How is the percent of cold work calculated? 4.