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- 👩🏼🏭 Welding Defects: Identification and Prevention Strategies
👩🏼🏭 Welding Defects: Identification and Prevention Strategies
Mechanical engineering updates, hot jobs, best video games for engineers, and our Engineer of the Week is...
Shubhangi Dua
February 29, 2024
Welcome to the Mechanical newsletter, where everything is about innovation, craftsmanship, and engineering excellence. Today, we will address welding imperfections by highlighting proactive identification and prevention strategies so your welds can stand the test of time.
This week, we have exceptional breakthroughs in 3D-printed titanium structures, electric supercars defying limits, and robots made of human tissue.
🚨 Aerospace, from commercial space flight to deep space exploration, our newsletter propels your aerospace career on Friday, click here to subscribe now.
🔥 Today’s hot jobs as featured on jobs.interestingengineering.com
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INDUSTRY UPDATES
⚙️ Australian scientists 3D print titanium structure with supernatural strength
RMIT University researchers built a metamaterial structure that is 50% stronger than the man-made alloy.
🏎️ BYD’s new electric supercar can take you to 62mph in 2.3 seconds
Yangwang U9 rivals high-performance electric cars with astonishing performance and battery life.
♻️ Advanced Materials: Decoding the protagonists in the quest for sustainability
Exploring futuristic materials for better efficiency, environmental impact, and overall performance.
🤖 Robots Built from Human Tissue
Scientists develop multicellular biological robots from human cells that present new possibilities in regenerative medicine.
🔘 Quantum Mechanics Meets Materials Science: A Revolutionary Approach to Molecular Identification
Breakthrough enables the creation of compact, efficient scanners that can identify a wide array of materials with higher accuracy.
SPOTLIGHT
Types of Welding Defects and How to Prevent Them
Welding is a key manufacturing process to fuse metals and create structures or components. Just like any other meticulous manufacturing activity, welding is prone to defects, too. Understanding these defects, their causes, and prevention methods is essential to prevent bad quality welds and maintain structural integrity.
Types of Welding Defects
External Defects: Visible flaws in welds located on the exterior of the structure.
Includes cracks, porosity, undercut, overlap, burn-through, spatter, underfill, excess reinforcement, mechanical damage, distortion, and misalignment.
Internal Defects: Undetectable without testing and usually located on the interior of the structure.
Includes Slag inclusion, incomplete fusion, and incomplete penetration.
Common Causes and Prevention
Cracks
High hydrogen content often causes cracks. It also depends on the elasticity of base metals, the selection of welding materials, and the presence of rigid joints. Preheating the materials and maintaining proper weld joint gaps are essential to prevent the formation of cracks.
Porosity
Porosity occurs due to contaminated surfaces, incorrect electrode selection, or inadequate shielding gas while welding. This can be avoided through careful surface cleaning, appropriate electrode selection, gas flow rate adjustments, and preheating materials before welding.
Undercut
Undercutting is caused by high-intensity currents, insufficient filler metal deposition, or hasty welding. One can prevent undercutting by adjusting arc parameters such as voltage and current or by ensuring enough filler metal is deposited during welding. Electrode angles and travel speed play a critical role when it comes to preventing undercut.
 | Engineer of the WEEK April 22 1985 Sam Altman  Entrepreneur | Computer Programmer |
Sam Altman has experienced a meteoric rise through the pantheon of American software engineers, and became one of the most well-known entrepreneurs in the world in 2022 with the emergence of ChatGPT, an Artificial Intelligence chatbot that was a vast improvement on previous chatbots and had a free interface that anyone could sample. Born in Chicago, Illinois, US in 1985, Altman grew up in St. Louis, Missouri, and received his first computer at the age of eight. He was hooked on them from then and headed to Stanford University in 2004 to study computer science. But after just one year, he dropped out to start his life as a software engineer and entrepreneur, forming Loopt, a social network mobile app that was location based. He was a hit with Silicon Valley investors, who dropped more than $30 million into the idea, but it couldn’t seem to acquire enough users. He sold it when he was 26 in 2012 for $43.4 million, though. | |
MOVIE RECOMMENDATIONS
🛃 The Terminal (2004)
Starring Tom Hanks and directed by Steven Spielberg, this comedy-drama tells the story of an Eastern European man stranded in a New York airport terminal after being denied entry into the United States.
🏩 The Grand Budapest Hotel (2014)
The Grand Budapest Hotel is an unforgettable cinematic spectacle directed by Wes Anderson, a director known for his unique visual style. This comedy film follows the misadventures of a hotel concierge and his protege.
🛬 Sully (2016)
Directed by Clint Eastwood, Sully is a biographical drama that remembers the "Miracle on the Hudson" emergency landing of US Airways Flight 1549. The film focuses on aviation engineering and human expertise in critical situations.
🪖 The Great Escape (1963)
This classic war film is a true story about a band of Allied prisoners of war and their efforts to escape from German captivity during the Second World War. The film is a portrayal of ingenuity and improvisation in dire circumstances.
🧬 Gattaca (1997)
It is a sci-fi thriller set in a futuristic society where social status is defined by genetic engineering. The story follows a genetically inferior man who assumes the identity of a genetically superior person to travel through space.
Here are the EVENTS you'll love:
Precision in Motion: Navigating the
World of Mechanical Engineering Innovations
Aug. 22 • 9 a.m. PT / noon ET
Designing Tomorrow: Insights for Engineers
Aug. 23 • 9 a.m. PT / noon ET
Merging Mechanics and Ingenuity: Webinar Series for
Mechanical Engineers
Aug. 22 • 10 a.m. PT / 1 p.m. ET
Spider-like robotic AI arms can be attached to and controlled by humans Remember Doctor Octopus and his robotic tentacles in the 2004 movie Spider-Man 2? A Japanese robotics company has engineered.
Spider-like robotic AI arms can be attached to and controlled by humans Remember Doctor Octopus and his robotic tentacles in the 2004 movie Spider-Man 2? A Japanese robotics company has engineered.
Spider-like robotic AI arms can be attached to and controlled by humans Remember Doctor Octopus and his robotic tentacles in the 2004 movie Spider-Man 2? A Japanese robotics company has engineered.
 | Written by KASHYAP VYAS Science & Technology Writer
|
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