10 Important differences between Cold working and Hot working
Metallurgy concepts
by Satyam Sastare
3y ago
Following are the 10 important differences between cold working and hot working Working of metal and alloy below their recrystallization temperature is known as cold working, and working of metal and alloy above their recrystallization temperature is known as hot working. During cold working strain hardening occurs and due to this tensile strength, hardness increases while the impact strength and ductility decreases, whereas, due to hot working strain hardening is removed by recrystallization. Microstructure of cold worked component shows distorted grains, whereas, microstructure of hot w ..read more
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Metal Working At High Temperatures.
Metallurgy concepts
by Satyam Sastare
4y ago
Here we will be dealing with different metal working processes, their parameters, their effect on mechanical properties and more... First let's see the classification of metal working processes based on the types of forces applied on the workpiece. Direct Compression type: Examples are Forging, Rolling. Indirect Compression type: Examples are Extrusion,Wire drawing, Deep drawing. Tension type: Example is Stretch forming. Bending type. Shear type. Working Process Parameters: Working process parameters are mainly flow stress, strain, strain rate, temperature of working. All t ..read more
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FORMULAS OF TRUE STRESS AND TRUE STRAIN
Metallurgy concepts
by Satyam Sastare
4y ago
TRUE STRESS: Formula for true stress is, σt=σe(1+e). where, σt=True stress. σe=Engineering stress. e=Engineering strain. TRUE STRAIN: Formula for true strain, ε=ln(1+e). where, ε=true strain. DO ASK ANY QUERY IN COMMENT BOX.   ..read more
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Weiss Zone Law
Metallurgy concepts
by Satyam Sastare
4y ago
Weiss Zone Law:- According to Weiss zone law, if a direction [uvw] lies in or is parallel to a plane (hkl) then it should satisfy the condition, uh+vk+wl=0. This law is applied to check whether the direction is parallel to the plane. Which concepts do you want to know from Metallurgy and Materials Science? Comment below!!!!!   ..read more
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Diffusionsdefinition
Metallurgy concepts
by Satyam Sastare
4y ago
Metallurgische Definition der Diffusion:THEORIE:Die Diffusion ist im wesentlichen die Bewegung von Atomen aufgrund des vorhandenen Konzentrationsgradienten, d. H. Die Bewegung von Atomen aus einem Bereich höherer Konzentration in einen Bereich niedrigerer Konzentration.Wir können Diffusion auch als Differenz chemischer Potentiale definieren, d. H. Diffusion ist im Grunde die Bewegung von Atomen aus dem Bereich höheren chemischen Potentials in einen Bereich niedrigeren chemischen Potentials.Man kann also sagen, dass eine Diffusion sowohl aufgrund des chemischen Potentialgradienten als auch au ..read more
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Austenitic Microstructure
Metallurgy concepts
by Satyam Sastare
4y ago
Austenitic Stainless Steel:(Interface analysis) Types of boundaries seen:- Grain boundary. Twin boundary. 1.Grain boundary:- The simplest type of boundary that is seen in every microstructure is grain boundary. These are high angle grain boundaries between two grains. 2.Twin boundaries:- There are two types of twin boundaries in the above microstructure Coherent twin boundaries. Incoherent twin boundaries. Coherent twin boundaries are lighter in color than both the grain boundary and the incoherent twin boundary. The lighter color is due to the low energy of these boundarie ..read more
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Diffusionsarten
Metallurgy concepts
by Satyam Sastare
4y ago
Arten der Diffusion:Hallo zusammen!In diesem Blog werden wir verschiedene Arten der Diffusion diskutieren, stattdessen können wir es auch verschiedene Arten von Mechanismen nennen, durch die Diffusion auftritt.Grundlage der Klassifizierung:Die Diffusion wird nach der Art der Stelle klassifiziert, die die Atome einnehmen.Substitutionsdiffusion besetzt freie Plätze.Die interstitielle Diffusion nimmt den interstitiellen Raum zwischen den Atomen ein.Arten von Diffusionsmechanismen:Es gibt zwei Mechanismen, durch die Diffusion stattfindet:Substitutionsdiffusion.Interstitielle Diffusion.Erläuterun ..read more
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扩散驱动力
Metallurgy concepts
by Satyam Sastare
4y ago
扩散的驱动力: 理论:相信我,您的大脑中可能会有一些与扩散的驱动力有关的混乱,大多数学生认为扩散的驱动力是浓度梯度。但是不幸的是,您会惊讶地发现,那些认为扩散的驱动力是浓度梯度的人是错误的。扩散的驱动力是化学势的差异。说明:发生扩散主要是为了降低系统的吉布斯自由能。如果仔细观察图a)和b),您会注意到A原子的扩散正在从较高浓度的区域扩散到较低浓度的区域,并且b)曲线还显示了吉布斯自由能的减少。对于B原子相似。而如果仔细观察图c)和d),您会注意到A原子的扩散是从A原子浓度较低的区域扩散到A原子浓度较高的区域,而吉布斯自由能仍在降低如d)图所示。对于B原子相似。这完全扰乱了从较高浓度的区域扩散到较低浓度的区域的观点。这是由于某些合金系统中存在的可混溶性间隙而导致的,这导致在较低温度下自由能曲线的负曲率。因此,这表明我们不能完全依靠浓度梯度作为驱动力。尽管您可以观察图e)和f ..read more
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扩散定义
Metallurgy concepts
by Satyam Sastare
4y ago
扩散的冶金学定义:理论:扩散基本上是由于存在浓度梯度而导致的原子运动,即原子从较高浓度的区域移动到较低浓度的区域。我们还可以根据化学势的差异来定义扩散,即扩散基本上是原子从化学势较高的区域向化学势较低的区域移动。因此,可以说由于化学势梯度和浓度梯度,扩散都是可能的。结论:冶金方面的扩散的最终定义:扩散的定义是,由于存在浓度梯度或化学势梯度,原子在晶格中的间隙或替代运动。请随时在评论中提问!!! ..read more
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