Glenn Evans’ Post

𝐇𝐨𝐰 𝐀𝐮𝐬𝐭𝐞𝐧𝐢𝐭𝐞 𝐑𝐞𝐦𝐚𝐢𝐧𝐬 𝐒𝐭𝐚𝐛𝐥𝐞 𝐚𝐭 𝐑𝐨𝐨𝐦 𝐓𝐞𝐦𝐩𝐞𝐫𝐚𝐭𝐮𝐫𝐞 𝐢𝐧 𝐒𝐭𝐞𝐞𝐥? 1. 𝗡𝗶𝗰𝗸𝗲𝗹 (𝗡𝗶) ✧ (Ni) has a strong affinity for the face-centered cubic (FCC) crystal structure, which is the crystal structure of austenite. ✧ When nickel is added to steel, it forms a solid solution with iron and promotes the stability of the austenitic phase. ✧ Nickel influences the arrangement of atoms in the crystal lattice, making it 𝒆𝒏𝒆𝒓𝒈𝒆𝒕𝒊𝒄𝒂𝒍𝒍𝒚 favorable for the steel to remain in the austenitic phase. ✧ This suppression (Inhibit) of phase transformations prevents the conversion of austenite into other phases, such as ferrite or pearlite, at lower temperatures.    2. 𝗠𝗮𝗻𝗴𝗮𝗻𝗲𝘀𝗲 (𝗠𝗻): ✧ Mn, like Ni, is an austenite-forming element. ✧ Mn in the iron matrix, forming a solid solution. This solid solution strengthens the retention of the austenitic structure even at room temperature.   ► This 𝗽𝗲𝗿𝘀𝗶𝘀𝘁𝗲𝗻𝗰𝗲 𝗼𝗳 𝗮𝘂𝘀𝘁𝗲𝗻𝗶𝘁𝗲 is a desirable feature in various applications, as it ensures that the steel remains ductile, tough, and corrosion-resistant under normal environmental conditions. Source: https://lnkd.in/d_tKZVkf #steel #alloysteel #metallurgy #materialsscience #materialsengineering #asme #api #aws #welding #piping #eaf #fabrication #oilandgas #qaqc #inspection #engineering