Low-cycle fatigue
Short-time strength is the maximum stress resistance of a material under rapid loading and few load cycles. It's key for load capacity in heavily fluctuating environments.
Physico-Chemical Mechanism of Action
Short-term strength (STS) describes how much force a material can withstand under rapid loads and few load cycles. It is the maximum stress the material can endure without plastic deformation or cracking.
Metallurgical Relevance & Risks in Welding
Under high thermal loads and rapid mechanical loads, the short-term strength of a material can drop significantly. This increases the risk of cracking, wear, and fracture. Poor STS can also lead to hot cracking, especially at high speeds or short load cycles.
Workshop Practice & Instructions
To increase short-term strength, it is important to perform careful heat treatment. This includes controlled cooling and possibly temperature-controlled solid-state deformation (TGF). When welding, the speed and load cycle ratio must be maintained to protect the STS. Recommended heat treatment times vary by material and application, but typically range between 10 and 60 seconds.