Short answer: Residual stress is locked-in strain from machining, welding, grinding or heat treatment — usually tensile and harmful near surfaces, causing distortion and crack growth — and is relieved by stress-relief annealing, tempering or, for fatigue life, converted to helpful compressive stress by shot peening.
At a Glance
Where Residual Stress Comes From
Any process that heats, cools or cuts unevenly leaves locked-in stress. Welding deposits tensile stress and distortion; machining leaves a tensile skin that can crack; grinding can burn the surface; quenching creates martensitic stress. The heat-treatment background is in Metal Heat Treatment Guide e Stress Relieving Vs Annealing.
Measuring & Relieving
Stress is measured by X-ray diffraction, hole-drilling or sectioning. Relief comes from stress-relief annealing (or PWHT after weld), tempering after hardening, and balanced cooling. Shot peening deliberately adds a compressive skin for fatigue — the process in Shot Peening Guide — which couples with the fatigue limits in Metal Fatigue Endurance Limit.
Design & Quality
Control residual stress to avoid distortion and stress-corrosion; the SCC risk is in Stress Corrosion Cracking e Metal Corrosion Fatigue Guide. We anneal or temper parts per Annealing Vs Normalizing and can document relief cycles on the mill cert per Mill Test Certificate Guide.
Get a Quote
Tell HXSCO your requirements and we will respond with a competitive quote and lead time.
Domande frequenti
Uneven heating, cooling or cutting — welding, machining, grinding and quenching all leave locked-in stress, usually tensile and harmful near surfaces.
Commonly by X-ray diffraction, the hole-drilling (ring-core) method, or sectioning and strain release; each suits different accuracy and part size.
Stress-relief annealing (or PWHT after welding), tempering after hardening, and balanced cooling; vibrating stress relief is used for large welds.
Not always — shot peening adds a compressive surface skin that improves fatigue life, deliberately used on springs and turbine parts.
Yes. HXSCO supplies machined and welded parts with stress-relief or temper cycles documented on request; tell us your specification.
Source Stress-Relieved Parts from HXSCO
HXSCO supplies machined and welded parts with documented stress-relief or temper cycles. Send your specification, grade and quantity for a quote.