Dear students kindly click on below link to access Module -4 ( JOINING PROCESS & ENGINEERING MATERIALS) Lecture notes.
https://drive.google.com/file/d/0B9Cq80e6dRYwWUV1LWVMcmxHMUk/view?usp=drivesdk
https://drive.google.com/file/d/0B9Cq80e6dRYwWUV1LWVMcmxHMUk/view?usp=drivesdk