【Daily Question】1.11 Determine stress corrosion fracture (3 wealth points for a reply; +3 to -8 wealth points for a correct answer)
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Question content: Judgment: Both ductile and brittle materials can suffer from stress corrosion cracking. ( ) Regarding the requirements for answering the questions and providing hints: It is sufficient to answer correctly or incorrectly; analysis can earn extra points. Hint: If you’re unsure, you can guess. Note: We will close this thread after 24 hours, during which time we will announce the best response (the most helpful one), along with the answers and explanations. Other details: Recruitment for moderators & technicians in the [Mechanical Section] – applications and referrals are welcome. [Valid indefinitely] [If you’re interested, come ahead!] 】(Click to enter) 【Mechanical Zone】Comprehensive guide to preventing equipment freezing over during winter 【Mechanical Zone】Call for collection of essential knowledge【Seeking manufacturer sponsors】(Ongoing campaign)【Rewards for recommending valuable content; the “Active Users and Weekly Stars” competition in the Mechanical Zone has begun】Wealth, metals, corrosion, zones, machinery
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Yes, austenitic stainless steel is a ductile material that has a tendency to suffer from stress corrosion due to halide ions such as Cl. Carbon steel and low-carbon steel are susceptible to hydrogen embrittlement and alkali embrittlement.
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Yes, stress corrosion fracture is a metal failure phenomenon caused by the combined effect of stress and a corrosive environment (see metal corrosion). It has three main characteristics: ① Stress corrosion fracture is a function of time. The greater the tensile stress, the shorter the time required for fracture ； The stress required for fracture is generally lower than the yield strength of the material. Such stresses include those generated by external loads, residual stresses, and the wedge-shaped stress caused by corrosion products. ②The corrosive medium is specific; stress corrosion cracking occurs only in certain metal-medium combinations (see table). In the absence of stress, the corrosion rate of metal in its specific corrosive environment is minimal. ③The fracture velocity lies between pure corrosion and pure mechanical failure, and the fracture surface is generally of a brittle type.
Both ductile and brittle materials can experience stress corrosion fracture. (Yes) Specific conditions for stress corrosion to occur Stress corrosion requires three elements: stress, a specific corrosive environment, and a sensitive metal.
Both ductile and brittle materials can experience stress corrosion fracture. (Yes)