In the vast ocean of knowledge, every subject is like a unique island, which is closely connected with each other and has its own characteristics. It is called "interlacing like a mountain". Doctors explore the mysteries of human internal medicine with superb medical skills, and in the hall of materials science, metal materials also have their profound and fascinating "internal medicine"-metallography. Here, metal is no longer a cold, hard iron pimple, but a living body with a rich "inner world", and metallography is the "genetic code" to unlock these secrets, which is a unique language of metal.
Entering the Fantasy World of Metallography
Imagine that when we hold a microscope and gently adjust the focal length, there is such a gorgeous and colorful microscopic world hidden under those seemingly ordinary metal surfaces. Today, let's become explorers in the micro-world, and unveil the mystery of metallography of 20 kinds of metal materials together. From delicate etching process to precise magnification, each metallographic picture is a work of art carved by nature and artificial intelligence, which quietly tells the "story" of metal materials.
Interpreting the language of metal: the mystery of metallographic structure
In this micro-universe, nouns such as martensite, austenite and pearlite are as bright as stars. They are not only the key words of metallography, but also the direct reflection of metal properties and behaviors.
Martensite: This "tough guy" is famous for its high hardness and high strength. It is a common microstructure after quenching. Its shape is like needle or plate, which shows the indomitable toughness of metal.
Austenite: in contrast, austenite is more "mild". It is a stable structure of steel when heated to high temperature, with good plasticity and toughness, and is the basis of many metal processing processes.
Pearlite: This name sounds full of poetry. It is a lamellar structure formed by alternating ferrite and cementite, with pearl-like luster, which symbolizes the beauty and harmony inside the metal.
Of course, there are more fascinating organizational forms in metallography, which have their own unique morphological characteristics and physical properties, and together constitute the complexity and diversity of metal materials.
Metallography, a seemingly abstruse but fascinating subject, not only allows us to see the inner beauty of metal materials, but also allows us to understand the close relationship between material properties and microstructure. Just as doctors maintain health by reading human body codes, materials scientists also optimize material properties and promote scientific and technological progress by analyzing metallographic maps. In this process, we can't help but sigh: metal has such a rich and profound "inner world"!
