Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

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Introduction

Cold working can improve or alter the surfaces of metal products. Peening is a cold working process where the surface of the metal is blasted by shot pellets.

This induces compressive stress in the region just below the skin to compensate for the stretching of the skin. When a tensile load is applied on this residual compressed load, the net effect is a reduced amount of stress on the part. This makes the metal well suited for fatigue applications which involve cyclic loads-such as gears, crankshafts etc.

Most weldment surfaces are under tension due to shrinkage after being exposed to welding heat. Peening can reduce tensile stress by inducing compressive stress on the part. In this type of application peening is done by using hammers.

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.