AHSS Insights

Information to educate on the use of Advanced High-Strength Steels

Process Maintenance and Quality Control

Process Maintenance and Quality Control

AHSS applications are growing, where the high strength body components help meet crash requirements, and thinner sections achieve weight reduction for improved fuel economy and lower overall emissions. Both higher strength and thickness reduction contribute to lower...

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Managing Springback

Managing Springback

Compensating for material springback during the forming process can be challenging. During forming, stress is applied to the material making it conform to the die geometry. The material will strain or displace across the die geometry, which consists of complex shapes,...

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AHSS and Springback

AHSS and Springback

Every stamped part has springback. When sheet metal is plastically deformed into a part, the shape of the part always deviates somewhat from the shape of the punch and die after removal from the tooling. This dimensional deviation of the part is known as springback....

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AHSS Edge Stretching Limits

AHSS Edge Stretching Limits

A common problem in every stamping plant is trim edge burrs. As new materials have been introduced, special trim breakage (clearance) or entry amounts may be required. Researchers are still trying to understand the edge stretching limits of these new materials. Edge...

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AHSS Strain Hardening and Gradients

AHSS Strain Hardening and Gradients

The mild steel currently being used for sheet metal stampings has higher n-values than High Strength Low Alloy Steel and Advanced High Strength Steel. The high n-value indicates that the material has a higher work hardening exponent making the steel much easier to...

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AHSS and Laser Welding

AHSS and Laser Welding

Laser welding is finding its way into more vehicle applications due to inherent weld strength, adaptability to complex weld geometries, and lower part distortion (Figure 1). Automotive applications use a variety of welding joint designs for laser welding in both lap...

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Arc Welding Procedures with AHSS

Arc Welding Procedures with AHSS

Arc welds are normally used for vehicle components where the loads are high, for example in shock towers and engine cradles. Conventional arc welding processes (GMAW, TIG, and plasma) can be used as effectively for AHSS as with mild steels. The same shielding gases...

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Resistance Spot Welding Automotive AHSS

Resistance Spot Welding Automotive AHSS

Contributed by Menachem Kimchi, Ohio State University Advance High-Strength Steels (AHSS) have been resistance welded in automotive production lines in the last few years. However, the high strength and hardness can be expected to affect spot weld failure modes during...

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AHSS Unique Mechanical Properties

AHSS Unique Mechanical Properties

For many years, steel producers and stamping plants have gathered the mechanical properties of sheet metal. Individuals recorded properties such as yield strength, n-value and R-value to name a few. As new materials are introduced into the stamping plants, new...

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Introduction

Introduction

With escalating concerns about human-induced greenhouse gases, global legislators have passed more stringent vehicle emissions regulations through 2020, while considering further, aggressive targets for the next ten years. Automakers are...

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