Metals/Materials Articles

The metals/materials technology area has information on the most commonly used materials in metal fabrication ̶ carbon steels; stainless steels; high-strength, low-alloy steels (HSLAs); and the 6000 series aluminum ̶ and those that aren't as common, such as the red metals, refractory metals, titanium, and magnesium.

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Cold spraying

Protecting magnesium alloys from corrosion

November 6, 2007

Finding cost-effective solutions for protecting magnesium alloys from corrosion has become paramount in automotive design. Corrosion protection through cold spray might be the answer.

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Almetals staff

Ask for help

August 8, 2007

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Simply stated, ask. According to a recent Purchasing Magazine survey, buyers say they expect their distributor suppliers to provide them with the lowest prices and highest service levels. Separately, distributors say buyers do press them to provide more information, especially on pricing...

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New forms for modern autobody stamping

September 12, 2006

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With the introduction of stronger safety legislation and increased fuel prices, auto manufacturers must respond with higher car body stiffness for safety and lower body weight for fuel efficiency. The fields of materials development, engineering, and manufacturing are working together to achieve autobody weight reduction with improved crash characteristics.

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Warm forming of stainless steels - Part II

August 8, 2006

The ERC/NSM conducted experiments using round cup tooling to determine the influence of temperature on the limiting draw ratio -- the largest draw ratio of the blank-to-cup diameter that can be drawn successfully.

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Warm forming of stainless steels

August 8, 2006

Editor's Note: This article is Part II in a two-part series on warm forming stainless steel. Part II discusses simulation and experimental studies conducted by the ERC/NSM on formability of stainless steel at elevated temperatures. Part I, which appeared in July, discussed the rationale for and...

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Warm forming of stainless steels - Part I

July 11, 2006

To prevent martensitic transformation in stainless steel during drawing operations, warm forming has been explored. In experiments, warm forming eliminated intermediate annealing operations and substantially increased limiting draw ratio values.

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Structured sheet metal - Part II

June 13, 2006

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Vault-structured sheet metal undergoes very little strain hardening during structuring, so it can be deformed further into shapes such as cans, containers, washing machine drums, thin-walled detector tubes, heat exchangers, and light reflectors.

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Measuring the plastic strain ratio of sheet metals

June 13, 2006

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Determining how much a metal can deform before thinning or fracture occurs is necessary for designing a reproducible forming operation. Testing the incoming sheet material is also essential because material properties may vary from coil to coil and affect the part quality and scrap rate. Understanding a material's plastic strain ratio and how to measure it are crucial in accurately establishing a material's formability.

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Warm forming titanium parts

June 13, 2006

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Senior Editor Eric Lundin visited a fabricator that specializes in aircraft components, M-DOT Aerospace, to learn how the company uses warm-forming of titanium to manufacture a cradle for an auxiliary power unit, or APU. Understanding titanium's characteristics is the key in forming this durable, corrosion-resistant, tough material.

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Structured sheet metal

June 13, 2006

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Editor's Note: This article is Part II of a two-part series discussing structured sheet metal and different structuring processes. Part I compares various structuring processes. This column was prepared by Michael Mirtsch and Ajay Yadav of the Engineering Research Center for Net Shape...

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Structured sheet metal - Part I

May 9, 2006

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Increasing sheet metal component rigidity while reducing weight can be achieved by substituting steel with aluminum, magnesium, or titanium alloys; advanced high-strength steel (AHSS); or 3-D structured sheet metal.

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Defining material specifications

May 9, 2006

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The root cause of splitting problems in deep-drawn parts often is that the process is not designed and engineered to accept the full range of mechanical properties within the ASTM specifications.

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Guidelines for forming high-strength material

April 11, 2006

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High-strength materials are becoming more common in stamping, especially for the aircraft and space industries. Although they all have their own specific features, they have some common characteristics and typical reactions to stretching and drawing.

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The benefits of materials engineering

October 11, 2005

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U.S. stampers are missing an opportunity to gain a competitive edge by offering materials engineering support, which often is lacking within OEMs and Tier 1 suppliers. Many stampers take the position that they "just build to a print"—but so do overseas shops.

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Introduction to advanced high-strength steels

September 13, 2005

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Part I of this two-part series presented an overview of advanced high-strength steels (AHSS). This article addresses issues encountered when processing these grades.Using AHSS in appropriate applications offers opportunities for reduced product weight, enhanced crash performance, manufacturing...

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